Beware anyone peddling anything.
Beyond that, try not to judge books by covers, messages by the messengers.
I'm afraid we pass up actually good opportunities because people have personal problems with individuals involved.
Sort of a cut off the nose to spite the face situation, to throw in one more idiom.
Let's see what Jack comes up with. And judge it on its own terms to see what it offers us.
There are SERIOUS problems with fediverse, and maybe BlueSky will offer something better, especially more decentralized.