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.