If you're looking for an exciting way to put around $20 in someone else's Paypal account and get absolutely nothing in return, I highly recommend Trafficdart.com.
Tafficdart.com claims to provide pop-under ads for Web sites.
Before you stop me and ask why I would waste money on bulk traffic anyway, I understand that bulk traffic is very low-quality traffic.
I paid for the service because I am more interested in getting the word out than I am conversions right now, and I wanted to send a quick burst of traffic to ThePrincessBlog.net.
This morning I logged in and was told they had sent more than 2000 visitors to my site. The problem is, these are invisible hits. In other words, not one of them shows up on my hit counter (nor on the logs at my Web host). I sent an email asking about this when I first noticed yesterday, but received no response, of course.
I found Trafficdart.com from a Google Adwords ad. If Google is really interested in eliminating egregious bullshit from their search results, Trafficdart.com would be a great place to start.
Having said all that, if anyone knows of a real, reputable company that provides actual pop-under views that can be seen by real people (and a hit counter), please email me and let me know about them.