“Users who buy both typically spend three times more than a subscriber and three times more than users who just buy APS... you're capped with a subscription model those users can't buy anymore so they can't spend any more even if they wanted to.”

Hybrid Buyers Spend 3× More Per Year Than Subscribers — The Revenue Ceiling Problem

A subscription creates an artificial ceiling: once someone pays their recurring fee, they have no path to spend more even if they're power users. Google Play's data shows hybrid buyers — those who subscribe AND buy consumables — spend three times more annually than pure subscribers. The ceiling only hurts the developer; adding consumable options breaks it without breaking the existing base.