So, how can we, the users of these sites, continue from here? The only way I can see is by ignoring the company. We need to think of SO incInc. as the absentee landlord and not as the friendly parent we remember. This does not mean we need to attack them or even try to antagonize them, we simply expect nothing more from them than that they keep providing the servers and software that run the sites. We should think of them as nothing more than service providers. We are not friends. We are not colleagues. We have no shared goals. They're just the faceless company that provides us with a service.
So, let's just forget about SO incInc. They will eventually impose rules we refuse to follow, at which point we'll leave or be kicked out. But until then, those of us who want to continue should do so, and should accept that SO incInc. are no longer relevant.