For instance, Valve's Steam service is quite successful (it has major titles like Team Fortress 2, the Half-Life franchise, Call of Duty 4, etc.) and won't let you run any games without phoning home to it (and running a packet sniffer shows that it's sending some kind of packets home once every 15-45 seconds). You can't even play single-player gamers without it connecting over the Internet.
Also, the Need for Speed games have advertisements in them, when you've already bought the game. Like, you crash into an SUV and you see a big car insurance company logo on the side, and every time you get a call on your phone from one of the NPCs, you see a Verizon logo. If that isn't enough ammo to help people rationalize copyright infringement I don't know what is.