Are the "Buy Facebook Fans" Sites Scams?

[karma]

I recently paid $40 via Paypal to a site promising 1,000 Facebook fans. After paying, there was no place to enter my page's url, and no contact at all from the company. I sent two emails over several days, and when I didn't get a response I opened a Paypal dispute. They finally contacted me and said they were forwarding my campaign to their marketing department. But I noticed they never responded to the Paypal dispute. So is this all a scam?
To answer some questions~~

Once you open a dispute with Paypal, you have to wait a certain amount of time to make a claim. So I'm not worried about getting my money back if this is a bogus site. (On the other hand, they're Paypal Verified, so I would think if they had prior claims against them, Paypal would not do business with them.) I'm just wondering if they actually deliver.

The fans they get are real people (allegedly...) who have an interest in your site. They sound out thousands of invites until you get the amount of new fans that you paid for. The point of doing this is to grow your fanbase. When people see a "popular" site, they are more apt to join vs. a lame one with two fans