I think the sweepstakes are just incentives to pull you into their web. I keep hoping I'll win.
I haven't won yet and doubt I ever will. Have you noticed that all offers are spouting a sweepstake? Instead of an oral spiel, all offers are cyber. Isn't it a wonderful world? 
No real spiels. ;)You're right; it's all virtual, think of all that money floating around out there, it will start trickling down our way soon. We're ahead of this virtual web that's being spun; just by doing surveys, offers, and maneuvering the net, sooner or later you'll come across opportunities that will be hard to refuse.