If I could put my tinfoil hat on, I'd suppose that Mike Morhaime was in on the discussions where it was said, "This is going to be wildly unpopular, people are going to hate it, but it's going to make a ton of money in the end. This is what we're doing," and Mike thought to himself, "It makes sense, it's business, this is going to happen whether I like it or not, let me just walk out now and preserve my legacy."
I wonder if that's how it went down.