I don't think it ever stopped. Realignment is something that will never stop. Once it has started, it won't settle down or stop. There will always be teams jumping, until some authority steps in and put a moratorium on it. But that authority does not exist right now.
The $50M is not expected to stop anyone. The Maryland AG has filed suit against the ACC. No one thinks the final fee will be anywhere near $50M. And whatever the fee is the feeling is that it will be recouped with any move that would be made. On top of that if there are no voting/original members of the ACC left there's no one to pay the fee to.