Not every publisher/developer offers that as an option. That being said, even without the pre-order bonuses.. waiting for a price reduction isn't a terrible idea. I'm one of the pre-order people. However, I do try to limit it as much as possible to only collector's editions with physical rewards. In those cases, my payoff is the statue or whatever it is.The game, while usually something I want as well, is a secondary. Except for the few CEs I can purchase a year, I try to get as much as I can on discount on steam or humble bundle.