This is digging into pretty legal territory and copyright law is (arguably unnecessarily) complex – but licenses are things that you use to let people use your patents. I think that’s what they were initially and mainly; but then software and the copyleft movements kind of detached the concepts of licenses and patents.
The fediverse protocols could definitely be patented and licensed, but, like you said (or implied, really), that’s… sketchy af. Like, anyone we could trust to patent it would probably refuse to do it – Linux Torvalds would probably curse me out for even suggesting it, and the lecture rms gave me would probably never end.
Back in my day we used to make “tfw” (that feel when) or “mfw” (my face when) posts that rarely if ever contained a face or a feeling