Well, these sites are all less than 1 or 2 months old. These sites are just getting off the ground so numbers are still low (not as low as regular parking).
With the combine income from the sites i have easily made my money back already. My affiliates pay much better than parking sites and Adsense is doing alright. I am still waiting for alot of my pages to get indexed and trying out ways to get a page rank to gain more traffic. To me personaly $99 is a cheap way to host simple sites, and not to mention that this fee is for 100 domain names and you only get charged once to use this service for a lifetime.