I think your hitting the nail on the head.tomtom94 said:I'm so delighted that millions of people continue to pay this guy money.
In the end I think he does this because he can, it's a power trip. I'd also imagine the fact that he continuses to do things like this while produce some of the most successful games out there and make tons of cash, gives him an image of invincibility to people he asks for money from (when it happens). Being able to make a fortune while acting like this makes it clear that your not some flavor of the week, staying afloat on the fickle whims of fandom and current popularity.
What's more his continued operation shows that gamers, or enough of us, are very similar to junkies. Notice that none of what he has said or done has remotely hurt him financially. Even on these forums people will talk about how they mightg hate him, but they will still support his products with their money. Only engaging in a "boycott" when it's something they wouldn't have bought anyway which is entirely meaningless.
By the same token, what he said about them (indirectly) in his statements is going to be irrelevent if he ever approaches some of these other companies if he needs somethign from them someday, and drops millions on their lap. He knows this, so why should he care?