Web Monetization is being proposed as a W3C standard at the Web Platform Incubator Community Group.
GNU social now supports that initiative with the Web Monetization plugin.
With this, we also introduce an ActivityPub (FEP-8c3f) GS extension
gs:webmonetizationWallet. This enables actors to support other actors with Web
Monetization in the fediverse.
It looks like this: