This is a better deal for the board and a worse one for Sam than people realize. Sam and Greg and even Ilya are both off the board, D'Angelo gets to stay on despite his outrageous actions, and he gets veto power over who the new board members will be and a big say in who gets voted on to the board next.
Everybody's guard is going to be up around Sam from now on. He'll have much less leverage over this board than he did over the previous one (before the other three of nine quit). I think eventually he will prevail because he has the charm and social skills to win over the other independent members. But he will have to reign in his own behavior a lot in order to keep them on his side versus D'Angelo