The biggest one I know of that's meant for your example use-case is Flattr but as you can tell by needing to ask, nobody's heard of it or really cares much abou

The biggest one I know of that's meant for your example use-case is Flattr but as you can tell by needing to ask, nobody's heard of it or really cares much about it anymore. These days it seems to be a bit more similar to Patreon. https://flattr.com/ https://flattr.com/