Some of these deals work really well, it totally depends on how well the ISP manages their servers and network.

What these guys are doing, of course, is grossly overselling their bandwidth. They probably have 200 sites on one server, and there's no possible way that one server could serve 40,000 gigs of traffic a month, so they are assuming that 95% of the people will be actually using 10 gigs or 5 gigs or something.

The main thing is to keep your eye on the server. If they give you access, look at the total bandwidth usage graphs for the server you're on, what the load average is, and this will tell you if the server is within capacity or is straining.

Max, for a paysite, the last think you want is a site that loads very slowly, and that will often happen at certain points during the day with shared servers because of fluctuating use.

If you're paying .45 a gig, you are grossly overpaying compared to what's available now. Both Softlayer.com and ThePlanet.com (and probably many others) have servers with good quality (tier 1) bandwidth for around .10-.15 a gig if you're buying 1000 gigs/month or more. And, if you know where to look, there are even better deals on "bargain" bandwidth (Cogent, for example) where it can get down to 2 or 3 cents a gig.

But I agree that it's nearly impossible to lose with a buck a year for 2000 gigs/month. Just don't expect that you'll actually consistently be able to *get* your 2000 gigs/month.