It's existed for a little while. Jack Dorsey fucked off from Twitter and made another Twitter, but one that was 'decentralized' (whatever that means). It flew under the radar for a bit, but it got a surge in users after Elon joined team Trump, and again after Trump won. From what I hear it a purity spiral hell, is lousy with actual child porn, and right-wing trolls are still pissing in their hugbox.