As a 'business of sports' nerd it would be interesting to know if there was some sort of buyout clause that was triggered by time or by Snyder himself, or if he had to make individual deals.
Owning an NFL franchise is a license to print money and a huge boost to the ego. I think the man is a jerk, but gaining 100% control of a NFL franchise is a great business move.
Also I think it's still amusing that he still rolls with the WFT name. It's his own special way of saying FU to the entire world.