Depends what you mean by best. Back in Bittorrent's first heyday I got into a few but they had ridiculous seeding requirements. Like everyone had to have a seed ratio above 1, which is obviously mathematically impossible (I guess people just faked it). And I think you had to upload new content too which is also a big ask when pretty much everything was already on there.

Definitely a "torrenting is my full time hobby" thing not "I want free stuff".

Mine had none of those reqs. You found bad ones

Agreed, but do you have any tips on getting into them?

Know people or kick rocks, tbh. Any I’m in were over a decade ago, or from a previous one that closed, and some are long closed to invites.

Lurk on r/trackers . They usually have up-to-date information on trackers who are doing interviews. From there you go to invite forums once you contribute enough.

Used to be there was one that did public "interviews." You could use that to get in there, be a good participant in the ecosystem, and eventually gain access to an internal forum where other sites recruited. The specific site I'm thinking of shut down, but there might still be a process like that; I don't know.