Hm ok, coffee taken now let's try again, third time's the charm!
Thing is, even counting that success which is rare as you say (and I don't think the stories about Starforce's interaction with the OS are just pro-pirate propaganda as you seem to insinuate), the approach (stick) they have taken isn't working. BIS used FADE for their games, which was a neat idea but ultimately cracked relatively quickly (although the process is pretty lengthy). You can check the release log and see how soon the groups put out big name games, patches and DLCs. I had thought they could try to entice people (as weird as it is to provide an incentive to not pirate heh) with features like MP or some other kind of goodie.
Problem is, I guess, that any DRM that will work, is DRM that no customer (hopefully) will want on their PC.