I fully agree with you. I'm absolute skeptic about anything Facebook and Twitter and other multi-billion dollar tech companies support. Especially because, the whole project of a decentralized social network, if this succeeded, and really became mainstream, these same companies would loose A LOT of power.
It would be easier to compete with them, they would lose their role as being the gate keeper of acceptable debate on a huge part of the internet, so there's a huge down scepticism from my part, thinking "they will find some way to taint and contaminate this whole project... somehow". Twitter would never actually embrace this idea, certainly voluntarily.
it'd be a sign of good faith if Jay/the team could at least adopt a presence on the existing decentralized/federated social networking system recommended by the W3C.
Like, at the minimum they can stand up a WordPress blog and use a plugin to do so from their own domain. I'm not holding my breath in the meantime.