Your argument makes sense when referring to many companies and games, but Machinarium is very good. I pirated it and then bought it, which very few people do according to them, and yes, I do not pay for games that suck (but I pay afterwards for almost every indie game I play because they're usually really good).
Amanita Design is the company that threw in a free game to all buyers of the Humble Indie Bundle at absolutely no profit for themselves (other than good PR of course). They seem to be talented and decent people and I hope more of their players will compensate them for their games.