My thinking is that blue sky exists for Twitter to:
- relieve regulatory pressures in the context of EU's DMA or US-based regulatory efforts with regards to online platforms. ("look we're trying, don't fine us!")
- be able to set the agenda wrt interoperability when and if it ever comes to enforcement of DMA or US-based efforts ("actually, we should do it our way!")
- aquihire talent of emerging decentralized competitors ("hey @Gargron want to be paid to work on the future of decentralized social media?")
- keep a lot of people busy in a controlled opposition
- preposition to do a classic Embrace Extend Extinguish (https://en.wikipedia.org/wiki/Embrace,_extend,_and_extinguish)
None of these are explicit goals of course, but they are too advantageous side-effects to ignore and it would be naive to give companies that size any benefit of the doubt.