Google Play In-app Billing does not support donations [1], so open source developers should be allowed to link to their own donation pages. Google Play policies do not spell out that linking to donation platforms such as Patreon is forbidden. Disallowing developers from using in-app billing for donations, while also barring them from linking to external donation platforms, puts open source projects in a difficult pos…
Ok, I had to stop there. They have no claim to this as long as they distribute within the store. It would be nice if google allowed this, but there is no obligation. App Stores are monopolies and should be regulated to allow open distribution.