Yeah it's because Steam catches that kind of stuff now.
There's a Steam thing somewhere, if you have it, then you can basically download any game from Steam for free. Fuck Torrents.
I think something like a Steam Emulator was called No-Steam or something like that. I used it for a bit but IIRC, I could only join hacked servers (similarly to playing torrented CoD4/5 MP). AFAIK, it's gone now though. I can't find it.