Intentionally destroying the resale value of your product wouldn't be a smart move when the target market is fairly technically sophisticated and prone to post rants on internet sites frequented by the rest of your target market.
There's more competition for the same users when it comes to things like mice. There's only one Mass Effect 3, and some other game, no matter how good simply won't do if you want to play Mass Effect 3.
Mice substitute for each other much better than games do. If someone replacing a Razer mouse discovers it's difficult to resell because its functionality is crippled, they're not real likely to replace it with another Razer.
