You can just privately (or publicly) label stuff and have all your labels saved on your general personal relay.
What's the benefit of having a different relay for every action / content type like this?
That's literally what we have events for no?
Discussion
Labels are extra exciting to me, because with #communikeys I can target Labels at Communities.
Reposting to a specific group, with a tag.
Been needing that for over a decade.