Ah, the Mask group that bought out the huge 800k user #Mastodon jp instance?
They've specifically stated their intent is to embrace, extend, (and presumably extinguish), with this purchase being their first major move. https://finance.yahoo.com/news/mask-network-acquires-pawoo-net-070000858.html
That official Mastodon client which recently hit? Guess who was involved with that. Presumably because they were already making one of the more popular 3rd party clients. https://masknetwork.medium.com/the-first-official-application-of-decentralized-social-media-network-mastodon-will-come-online-e7742dd30d9d