Here's whats been happening in a nutshell. The game sells poorly because PC players were disgusted with it
and because pc piracy is so rampant, the publisher
wrongly blames
it only on piracy on the PC for low sales, publisher devotes more resources to console games
where, in general, it isn't easy to pirate, usually needs a hardware modification, and where there is a bigger pool of people to increase the chance of buying your game regardless of the quality, which leaves less for the PC versions
because the market isn't as big and piracy is so much more rampant among the market. The PC versions become even less optimized, more buggy, and receive less support, PC sales suffer. Publisher blames piracy and devotes more resources to the consoles. Rinse, lather, repeat.
On the plus side though, since PC gaming is the only thing keeping me running Windows, there's a good chance Windows 7 will be the last MS OS I buy, since the odds are that I won't get an educational discount on Windows 8.