Well I guess it's worth a shot. I mean, some folks may be looking for abandonware or somesuch but don't realize it's available legitimately. Not everyone who uses TPB is necessarily a hardcore lifetime pirate... plenty of them are just looking for one thing specifically. And if they end up liking the game, they may buy it for real. I know a couple of my friends use pirated copies of games to try them out because nobody makes demos anymore, and at least one of those friends is pretty good about actually buying the game if he likes it. (Not sure about the other one.)
But I wouldn't expect anything major to come of it.
Coelocanth: Why would we be on the pirate bay in the first place?
Fuzzyfireball: Cartoons.
I did that, actually, for the Tick, because both of the DVD releases are missing an episode, which I didn't realize until after I'd bought them. So I acquired the missing episodes. Apparently they weren't available on DVD because DC Comics was being douchebags about some name rights.