The Nike thing wasn't his choice: they had the right to match any offer. (Kind of an endorsement-deal version of restricted free agency.)
Obviously, I missed that along the way! I don't usually pay attention to who signs where, and for how much; this had just got my attention because it fit into my 'Durant To DC' theory.
Honestly, I hate the whole shoe deal thing, anyway. The amount of money paid out is beyond obscene. I always say, these guys talk about 'helping the community' and whatever; how about asking Nike to sell a 15 dollar pair of shoes? I remember when Stephen Marbury signed a deal with someone (I think it was And1), to sell a 20 dollar pair of kicks. I mean, they weren't in high demand (because they weren't Nike or Adidas), but at least the guy made an effort (probably one of the only unselfish things he ever did).