I'm guessing they are not interested in selling to small businesses and professionals; they probably want to sell a high-priced "enterprise version" to corporat

I'm guessing they are not interested in selling to small businesses and professionals; they probably want to sell a high-priced "enterprise version" to corporates and keep it free for the masses. They may possibly make money off the free blogs with some ad network (perhaps they have something cooking there and that's why they don't allow google ads). </speculation>