The important figure (for developers) is not what proportion of pirates would buy the game, but what proportion of possible buyers will pirate instead.
My experience with my social group is that this second group is quite high. I know (for example) people who have bought many xbox 360 games (as these are hard to pirate) and have never bought a PC game, despite playing similar number of games on each.
My experience with my social group is that this second group is quite high. I know (for example) people who have bought many xbox 360 games (as these are hard to pirate) and have never bought a PC game, despite playing similar number of games on each.