"Even if relatively few people actually #DeleteFacebook, as more people start spending more of their time elsewhere, three powerful   and synergistic   feedback loops will start to kick in. Too bad for Facebook. Good news for everybody else!"

There's a paragraph talking about #Mastodon as an alternative, and links to posts by @Gargron and @creatrixtiara .

https://medium.com/a-change-is-coming/a-potential-tipping-point-part-2-of-facebook-is-fucked-22497063b966