Thats because people are idiots, who would rather buy a product that costs what ever as long as it has a discount sign next to it. So stores use discounts all year long selling the things at regular price but they just have a -20% next to it. And people buy it like crazy, while they ignore the exact same product at the exact same price, just because there is no discount mark next to it. Its also the idea behind the whole X.99 price tags. Hey its no 2 bucks if its just 1.99
Preorder is the same shit. "Buy our game, before its even finished based on the information that WE hand pick and feed you, and you get a bonus that we already put in the game, but decided to lock it so we can sell it off as DLC later. Ofcourse you have no guarantee that the game will be good, but we say itll be great so you know itll be good."
Please are the current marketing dissasters not bad enough? Just look at AC: Unity. Characters clipping in to walls, crashes, lag issues across ALL platforms. The game is a buggy mess and the outlets who got review copies were forbiddent to even write reviews untill 12 hours AFTER the release.
Honestly why are people supporting this sort of behaviour.