I’m doing the same thing and find it hard to believe that this is somehow seen as grandstanding or abandoning the US players. They will easily be able to find places to play. Whether they can still get their money in and out – time will tell.
Casinomeister’s site theme is similar to this one in that it claims to weed out the good from the bad in this field. I don’t think that will change for him. He (and the players) will just have a lot less to choose from. I think it’s the least risky decision for US based affiliates.