Comment by strnisa

Subscriptions are great for predictability, and most apps should keep them.

Small Transfers can be added to help with:

  - users who dislike subscriptions
  - infrequent users
  - reducing/removing free-trial costs for non-converting users

A common pattern is hybrid pricing: pay-as-you-go (PAYG) for light/occasional use, a subscription for regular use. Similar to mobile plans, where monthly plans become cheaper above a certain usage threshold. I use this pattern for one of my services: https://unattach.com/pricing

I believe that Small Transfers also enables services that aren't viable with subscriptions or prepaid credits, e.g., a movie-suggestion service.