He specifically says that it doesn't care about what web sites you are visiting, it's the adresses to the cheat DRM servers it looks for, to detect if a cheat has dialed home from that computer. It only checked this if the account was already suspected of using the cheat.
So, in an impressive turn of events, many cheats now include DRM and anti-cheat codes. These phone home to a DRM server that confirms whether or not a cheater has paid to use that particular cheat
Also, he says that since the cheats invented countermeasures to this in just 13 days, they already stopped doing it. The summary is quite misleading. (Not necessarily a big surprise on slashdot...)