I sometimes equate AMP experiences to restaurants. They set up a restaurant, the crowd comes in, the chef knows how to cook, however they pull back on the food, and it sucks. Why bother going into a repeat business and sabotage it with bad food?
Well, if people keep coming back, there is no reason to improve the crappy food. Now apply the above to AMP's with lackluster experiences. We keep going back to the crappy restaurant, and the owner has no reason to improve. they are always crowded, always making money, and always getting new clients.
Sad but true.