Lifetime Value Part 30: Why clumpiness should be one of the KPIs you focus on

When calculating customer lifetime value (LTV),there is one KPI that is often neglected, clumpiness. Clumpiness is a term coined by Eric Bradlow, a marketing professor at Wharton. Think of clumpiness as binge-watching Ozark (or, if you must, Tiger King). Rather than an extended, constant period of consumption, a short, intense buying burst. By understanding and tracking this behavior, you have a significant weapon for improving LTV.

Defining clumpiness

Clumpiness refers to the fact that people buy in bursts and that those customers could be extremely valuable. When calculating customer value and segmentation, we focus on analysing recency, frequency and monetization of the customer (what Bradlow refers to as RFM). This analysis is based on customers making purchases in a regular pattern, i.e. coffee, diapers or milk. Bradlow’s analysis, however, shows that for certain products (and I would classify social and casino games here), customers actually monetize in bursts. Thus, you need to add C for clumpiness to your RFM modeling.

Why clumpiness is important

Bradlow researched how to predict the future value of customers (predicted LTV). Bradlow explains, “[l]et’s imagine you want … to predict who are going to be the valuable customers in the future. And you have four things you can use to predict it. As I mentioned: recency, frequency, monetary value and let’s say the marketing spend towards the customer. Those are the classic ways in which companies build what are called scoring models…. [T]he findings of my research suggest that higher clumpy customers are worth more out of sample, meaning in their future value, even after controlling for RFM and marketing expenditure — which means we have found another variable that firms should track [concerning] our customers and use it to predict their worth in the future.”

This finding is particularly interesting as most companies, especially in the game space, currently base their LTV projections on the RFM model. While this calculation may have worked in the traditional retail economy, consumption has evolved, especially for digital goods. Binge consumption is a fact of life in the entertainment space, and gaming sits squarely at the center of the modern entertainment environment. This analysis is consistent with Bradlow’s findings, where he says, “[i]f you look at historically purchased goods, clumpiness really isn’t there. But if you look in the new wave, the new economy, clumpiness is pervasive in every data set I’ve analyzed.”

Using clumpiness insights

Calculating clumpiness should be easy and not require tracking any new events. It is the same data you are using to calculate R, F, M and LTV. There are then several applications for this insight:

  • Incorporate it into your segmentation to get a better understanding of who your VIPs and high value players are, then focus your premium treatment (and benefits) on these players.
  • Use clumpiness to predict better what players are likely to become VIPs. This will help you concentrate your early retention efforts and reinvestment.
  • Focus reactivation on your clumpy players. Bradlow explains, “[i]f you reactivate them, they’ll come back and be clumpy again, and do a lot of stuff in the future. “
  • Do not simply rely on the KPIs you have always been trusting. Do not rely on simple theories of how your players behave, also look at things about arrival time or when people play. People who come in bursts, then go away and then come back in bursts and then go away are fundamentally different and have a different LTV.

By understanding clumpiness, you have a more accurate predictor of LTV. Once you know how to predict your LTV, you can then impact it by making changes that drive these variables.

Key takeaways

  1. We normally focus on analyzing recency, frequency and monetization of the customer but by adding a new KPI, clumpiness, we get a much better understanding of their expected value.
  2. Clumpiness refers to the fact that people buy in bursts and that those customers could be extremely valuable.
  3. Clumpiness can help you better segment players, predict VIPs and target your reactivation efforts and spend.

Lifetime Value Part 27: How to know if your advertising is working (with benchmarks)

The key to any successful product, particularly a mobile game, is for your CPI (cost per install) to be less than your LTV (lifetime value of a customer). As long as it costs less to acquire a new customer than they are worth, you have a healthy business. Once the cost of acquiring a new customer exceeds the value of that customer, your product or company will languish and eventually die.

The challenge of computing LTV

While virtually nobody would argue the logic behind using LTV to drive your marketing, implementing it is not always easy. Many companies do not have a reliable LTV formula for all of their products or a data scientist (or team) to create one. New products also do not have enough data to calculate LTV.

Even when you have a reliable LTV calculation for your product, every cohort of user will have a different LTV. Players acquired one month will not have the same LTV as those acquired a different month. Players acquired through one marketing channel will not have the same LTV as players acquired through a different channel. Same can be said for country, marketing creative, platform and many other factors.

You will also not have enough data early in a campaign to calculate LTV reliably. However, you do not want to spend on unprofitable campaigns and you want to support good campaigns with more resources.

The answer to measuring campaigns reliably

The best proxy for understanding if your CPI is below your LTV is ROAS (return on ad spend). ROAS measures how much revenue a certain cohort of users generates over the first X days of acquiring those players (with X normally measured after 3, 7 and 30 days).

While it sounds overly simplistic, short term ROAS tracks very closely with your long-term return, thus whether CPI < LTV. You can be very certain if your 30 day ROAS is performing ahead of target, your acquisition is profitable. Moreover, I have found that even 3 day ROAS is very indicative of long term profitably. I have not yet come across a situation where ROAS has indicated a campaign is profitable for it to falter when analyzed after months or years. I am now very comfortable relying on 3 day and 7 day ROAS metrics to decide whether to continue, increase or decrease spend for a product, specific vendor or campaign.

Benchmarks to target

Without benchmarks, ROAS numbers would be useless. You need to know what numbers to target. As I have been in the social casino space for about five years, I am only comfortable providing social casino benchmarks. When evaluating a product or campaign, I target a 3 day ROAS of 5 percent, 7 day ROAS of 10 percent and 30 day ROAS of 20 percent. For other genres, such as hyper-casual (where you generate most of your return early), your targets would be very different so understand your space before making decisions (actually before launching a product).

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What to do if you are missing your benchmarks

As with all metrics, ROAS provides guidance, not black and white answers. If your ROAS is slightly below the benchmarks, you may not have a problem, it could be noise. If one agency is outperforming another by 1 or 2 percent, again it may not be indicative, it may be luck (one caught an extra VIP). Conversely, if you are missing even by a little, it could be indicative of a deeper issue. A small miss also means that you should adjust conservatively until you see your 30 day ROAS numbers.

If performance is significantly behind ROAS benchmarks, then you need to find the cause. If it is across the board (all campaigns), then your product has issues. You either need to address these issues and improve retention or monetization (the key drivers of LTV and return) or not invest in the product. If the performance is worse on a particular platform, you need to dive deeper into your technical performance on that platform versus other platforms and how the user experience (CX) differs on the underperforming platform. If the underperformance is with a partner or channel, you should adjust your spend to focus where you have a stronger ROAS.

Key takeaways

  1. While the success of any product or company long term is ensuring its cost for acquiring a customer is lower than the value of the customer, it is difficult to calculate in the early days of a product or marketing campaign. ROAS (return on ad spend) based on the first 3, 7 or 30 days of a campaign provides a good proxy for whether the campaign is successful.
  2. In the social casino space (other genres may be different), the benchmark target ROAS is a 3 day ROAS of 5 percent, a 7 day ROAS of 10 percent and a 30-day ROAS of 20 percent.
  3. If your ROAS is underperforming significantly, you need to evaluate if you should continue investing in the product overall or in the specific marketing channels, while adjusting your marketing mix to optimize ROAS.