In terms of not knowing what works, what do you mean Rich?

Are you talking about choosing a domain name for a site that could be branded, like Yappo in the instance of TopBucks, or a domain name that can effectively sell the niche you will be promoting on the site or, even the program/paysite brand?

There are positives and negatives to each so you might be better off choosing a middle ground somewhere, where you can brand a name, the niche and also a program, which is actually a lot easier than it sounds LOL

Regards,

Lee