Push List Hygiene: Measure Subscription Decay Before It Measures You
A push list is a depreciating asset. Tokens expire silently when browsers rotate them, players clear site data, uninstall the PWA, or switch devices, and the count shown in your dashboard keeps smiling at the old number. List hygiene is the discipline of measuring that decay, cleaning it deliberately, and planning campaigns against real reach instead of reported reach.
Know your true active number
Reported subscribers and deliverable tokens are different numbers, and the gap widens monthly. Define an active as a token that received a delivered send within the last thirty days and publish acquisitions, expirations, and actives as three separate lines. One glance tells the business whether the list is growing or quietly melting while campaign volume stays flat.
Build a decay curve by acquisition cohort
Group tokens by opt-in month and source, then track what percent survives at 7, 30, and 90 days. Sources differ sharply: an opt-in captured mid-funnel after a value moment decays far slower than one harvested by a pre-prompt on cold traffic. The curve tells you both where to spend acquisition effort and when a cohort has aged out of high-intent messaging eligibility.
Clean expired tokens deliberately
Web push responses distinguish gone from temporarily failing. Remove the permanently expired tokens from your send lists on a schedule instead of letting the casino push notification platform attempt them forever. Cleaning reduces wasted sends, keeps delivery error rates honest, and protects the sending reputation your next campaign depends on.
Treat list age as intent
A token acquired ninety days ago that has ignored twenty campaigns is not the same audience as a fourteen-day-old opt-in. Segment send lists by age and give newer tokens the higher-intent and higher-frequency campaigns, while long-quiet segments get a single well-crafted re-engagement message. Blanket frequency across the full list is the fastest way to accelerate decay.
Plan volume against decay, not the dashboard count
Before promising a campaign around a list size, model the half-life: how many actives the current inflow replaces per month. If inflow does not cover expirations, some acquisition budget belongs at the opt-in step. Scale campaign volume only to the active number, or you will mistake delivery inflation for engagement.
Watch platform-specific churn
iOS tokens depend on the PWA remaining installed on the home screen, so an uninstall kills the channel silently. Android device churn in high-turnover markets, and periodic browser storage clears, produce geo-specific decay rates. Fold these patterns into your per-market reporting rather than averaging them away.
Report hygiene to the business in one line
Effective reach this month, and its trend, is the number stakeholders should see next to campaign results. Pair it with the opt-in guidance at igaming-pwa.com for the iOS install interplay, and log the decay audit alongside your QA workflow per the TrafficPopcorn re-engagement stack.
Next: the iGaming push notification QA guide on this site. Pair this with the TrafficPopcorn acquisition platform.