As a child of the 80s I find it weird to want to defend Microsoft but… I don’t think so.
What happened with Reddit and Twitter is they were small enough that incompetent short-termists VCs or delusional fascists were able to take them over without restraint.
Will MS try to squeeze a bit more revenue from GH in ways that are mildly annoying? Probably. Will they lay waste to the whole business by doing things that obviously destroy valuable good will? No.
https://social.kernel.org/objects/d0a8dc76-e5cf-423d-8f38-081b7569fe67