So honestly I feel half of this paranoia just has to do with the Gaming Industries' recent track record as well as BDobbin's silly YouTube videos.
Not pre-ordering, if anything, doesn't help anybody. Publishers rely on pre-ordering to make sure the game is a steady investment for future titles.
Low pre-orders only mean that the developer gets hurt in the long run, it won't somehow persuade the big-wig publishing company that "Oh golly, we better have a complete game on the market by release date".
So what can we do to prevent incomplete games from entering the market, well, incomplete? Voice your displeasure! If something isn't up to standards then never settle, but don't just mindlessly bash pre-ordering.
Obviously if you don't want to pre-order then you don't have to, but having all this hostility towards pre-ordering just doesn't sit right with me, and if your really that up in arms about the game then wait til' after said game releases... Or better yet, don't buy the game!
Edit: When I pre-order, I put my faith in that company that they will have the game done, so when I Pre-order Fallout 4 I am 100% confident that the game will be complete and worthwhile.
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I think pre-ordering ruins gaming. A company makes tons of money on their game before it's even released just because of some exclusives offered to those who pre-order. Then if the game is released and turns out to be a piece of sheisse, who cares they already made all the money. Even if the game is released and turns out to be decent, those gamers who waited to purchase the game until after release to make sure the game wasnt shiy before throwing money at it, get penalized by missing out on all the exclusive content. Tl;dr: it promotes poor buying behavior that gives way too much leniency to the companies making games.