>I hear this argument a lot but can't see how it possibly be correct. Sure, not everyone who pirates would buy instead but at least some people would (it probably is a small percentage, but it is not zero).
Consider that for lack of a demo, or other scenario, people who pirate the game but end up purchasing it later. Sure, not all pirates would buy the game they've pirated, but at least some people would (it probably is a small percentage, but it is not zero).
>One can imagine that the effect of those few is amplified for titles with high costs per unit.
I would argue mainstream titles would make up that difference through volume of pirated copies though.
Piracy isn't a non-issue, but it's just not a dire threat either. Decades of video game piracy has demonstrated that.