you can't draw conclusions based on a single protocol...
Why not? If I base estimations on a single protocol and ignore the existence of other ones, this will certainly result in an underestimate of piracy rates. If I conclude we have a big problem, the fact that my estimate is too small does nothing but reinforce this conclusion.
even saying that game A was more pirated than game B is wrong in this context. Though you could say that game A was more pirated by BT users than game B.
I don't think it's wrong. I see no reason to think that any given recent game should be disproportionately pirated on another protocol.
And this goes nowhere since BT is not evenly used through the world
The potential money isn't evenly distributed through the world either. There's a pretty strong correlation between regions with large PC gamer populations, and regions with lots of BT leechers.
if you're still interested by piracy one might want to check out Brad Wardell & Stardock on search engines.
Brad Wardell and Stardock are a bunch of smug assholes whose arguments rarely amount to more than a load of hot air. Like most of the laughably vague points on their "bill of rights." Since they aren't posting here, I don't care to debate them.