Bad move on Blockbuster, they think that affil will just stick around. WRONG, oh wells...let's wait until the payout rises again to promote.
My understanding is it is because affiliates were unable to follow the basic and conditions and rules so they just essentially scrapped the whole thing.
Think of that next time it crosses your mind that the rules don't apply to you, or they don't really mean it when they tell you not to oubit them on certain search engines, when they specifically them not to do it.