Aside some really specific titles, most of my games I have are pirated mostly for the sake of convenience(a few others were just because I really wouldn't want to pay for something I'd eventually hate).
But others aren't convenient enough to be pirated without completely spoiling it.
This is the case where the main attraction is the multiplayer experience.
For example I bought Quake Wars a few years ago just to find out how much my current laptop would suck at running it, and it didn't help that my internet provider has a laggy piece of shit service.
Even though, I'm definitely pleased to know Team Fortress 2 is available for FREE on Steam.
Like I was able to purchase Portal 1 the same way last year, even though I've been wanting to play it since its release, this year the game of the time is Team Fortress 2, much for my delight meeting two basic criteria I hardly could place together "it is free" and "getting it for free doesn't have any drawbacks".
Now I'm downloading it and sucking up all the internet link of my house (much for the dislike of my housemates - shared internet) I expect it to be finished tomorrow by the morning or early evening (again shitty internet).
My face when I read the news.