Google Play Store Stops Requiring the Use of Google Play Billing in the US (support.google.com)

It's almost like well-designed regulation can provide exactly the benefits it's intended to. This says that you can now use whatever form of in-app payments you want, or link to alternative payment methods outside of the app.

Some third party coverage in the news which gives some context for this change:

https://www.androidauthority.com/google-play-store-opens-up-...