There are still many conservatives on facebook, even after Zuckerbucks helped oust Trump. People won’t leave because they’d lose all their connections. The people who did leave ended up in a diaspora with some going to Parler, some to GAB, some to WeMe and some to Truth once available and some to other smaller sites.
No alternative to facebook has become big. That’s why Musk bought twitter. He could have started a similar site but it never would have gotten big like twitter. He bought an existing community more than he bought a website tech.
Actually, significant numbers of the Hard Left community just stood up and walked away.
Twitter grossed $5.1 billion in fiscal 2021
They lost $221 million.
In other words, Musk paid almost 9X times gross revenue for a 16 year old business that does not break even.
Sorry - that makes no sense at all.