Well typicaly its not the devs who decide on the copy protection, its the publishing house.
Honestly i dont think the publishers who decide on copy protections think about it at all they just see copy protections as a method of converting pirates to "sales" and actualy dont think about the numbers of legit customers they drive away, and many seem to think that every pirated copy = 1 lost sale (which is absurd). So they stick with these draconian copy protection schemes and stick their fingers in there ears, meanwhile the priates quickly get rid of the copy protection and live happily ever after, while often some to several of the game's actual purchasers suffer with said copy protection.
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