Greenheart Games famously released a "cracked" version of their own game (Game Dev Tycoon) onto torrent sites on launch day. In this version, the player's in-game studio eventually goes bankrupt because "pirates" steal their games.
The Data: Within 24 hours, 93.6% of players were playing the pirated version.
The Consequence: The developer's blog post highlighted the irony of pirates posting on forums complaining that the "in-game piracy" was unfair and "ruining" their fun. The experiment proved that even at a low price point ($8), a massive majority of the PC audience will choose "free" regardless of the developer's size or struggle.
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P.S.: It bears repeating that the game cost only 8 dollars.