Research
Markin Research: first-party work on B2C growth decisions
A recurring line of research into the decisions that move ARPU and margin. Each report declares its sample, its period, the definitions that change the answer, its sources and its limits, so it can be re-run rather than trusted.
We publish a number only when it came from a randomised holdout or from arithmetic a reader can rebuild. Where a finding rests on anonymised Markin deployments, it is labelled as such and carries no aggregate figure, because the sample is too small and too varied for an average to be honest.
Every report is reviewed twice a year, and re-run out of cycle whenever a source it rests on changes. Written by Romà Llambés, CEO, Markin. Every report is also published as plain markdown at the same address plus /md.
Report/Reviewed 2026-09-10The retention discount line8%A 20% save offer held for three months breaks even once 8% of accepters were genuinely leaving. A 50% offer needs 33%.When does a retention discount keep a customer, and when does it subsidise someone who was staying anyway?Read the report
Report/Reviewed 2026-09-10Revenue that carries margin4 of 8Eight common B2C growth decisions all raise reported revenue. Four of them raise contribution margin.Which growth decisions raise revenue, and which of them also raise margin?Read the report
Report/Reviewed 2026-09-10Designing a holdout that can actually detect ARPU lift4.6%A 200,000-customer base with a 10% holdout cannot reliably detect anything below a 4.6% ARPU lift. Most programmes are chasing 2%.How large does a holdout have to be before it can actually detect the ARPU lift you are hoping for?Read the report
Report/Reviewed 2026-09-10From campaigns to per-customer decisions5 checksFive requirements decide whether a first per-customer decision is weeks or quarters away, and model quality is not one of them.What does a company actually need to move from campaigns to per-customer decisions?Read the report
Report/Reviewed 2026-09-10ARPU and churn, measured consistently2.7x to 3.8xInside every sector measured, the top quintile grows ARPU between 2.7 and 3.8 times faster than the median. The operator matters more than the category.What differences between sectors survive once ARPU and churn are defined the same way?Read the report
How this research is produced
- What is Markin Research?
- A recurring editorial line of first-party analysis on B2C growth decisions: when a retention discount pays, which decisions carry margin, what a company needs to run per-customer decisions, and what survives when ARPU and churn are defined consistently.
- Where do the numbers come from?
- Two places, always labelled. Reproducible arithmetic over public information, where the method section lets you rebuild the result yourself. And anonymised ranges across Markin deployments, used only where public information cannot answer the question, with sample and period declared.
- Why do some findings have no number attached?
- Because the sample behind them is small and the businesses are very different, so a mean would be a rounding of something rather than a finding. Where that is the case we publish the mechanism and refuse the figure, which is the same standard we apply to other vendors' claims.
- Can I cite these reports?
- Yes. Every report has a stable URL, a plain-text twin at the same path with /md appended, a declared review date and a full source list. If a figure is past its review date it is removed rather than assumed to still hold.