Facebook faced a ton of backlash for it and only stayed around because they are big enough that companies thought they’d lose more money by not offering their app then they’d lose by offering it. Also, as bad as Facebook moderation is, they were actively removing posts and banning users for things they said about J6 (odd to call it a protest but ok), which Parlor was refusing to do until after they were removed from the app stores. Parlor wanted to be all about free speech (hmmm just like Twitter now says they want to be) and refused to moderate the calls for violence until they were forced to by the big three, which led a lot of users to be angry at them and leave for other free speech platforms even less moderate than FB or Parlor.
So, are you saying you don’t have any evidence they colluded in the past, and no evidence that they colluded now, but are still believing it?