I’m kind of doing something similar. Using Real debrid with debrid media manager, gives me an unlimited media library.
Then on a Pi 4 I use Zurg to mount the library into Plex. Not sure if this is useful to you 😊
I like cloudboxes.io
This might be promising? https://opentrackers.org/rareshare/
Found a crypto one but still asking for details for the account setup. Can’t see why that would have to be real?