@ChristianKrebel I doubt there's any practical need to bolt some payment related vocabulary on ActivityPub. The Fediverse is not suitable for disseminating very sensitive information like payment data so it's wiser to keep it orthogonal. Instead I think services should allow individually integrations with _existing_ payment providers. Liberapay would probably be the best choice, as it has similar ethics and goals as most Fediverse projects.Sure we can add an activity/object as a congratulatory side-effect: "Bob paid/subscribed/cheered for Alice", but that should be just cosmetic.