Building on Twitter's platforms is dangerous because a single leadership change could mean you're dead in the water. It has happened before, it'll likely happen again.
Bingo.
Of the two, Facebook has added functionality over the years that does quite well (groups supplant lazy entrenched competitors like forums and reddit, marketplace supplants lazy entrenched competitors like eBay and craigslist), while Twitter has... aligned themselves politically? Hired a bunch of bad ideas from Facebook to market themselves to celebrities (pre-censored posts)?
Speaking of aligning themselves politically, look at point #1 in their list of intended uses for the new API:
> Improve the health and safety of the public conversation
Looking to recruit free censors seems high on the list of needs / wants. The highest, as a matter of fact!
B-b-but -- Bluesky.
(please don't hold your breath while a protocol simply materializes. If this were a strategy Twitter cared about they would have made this move 10+ years ago when OpenMicroBlogging and OStatus were being kicked around).