I agree with mtime88 (and not just because I am selling such sites, although I am).
Look, the CPA network knows that most of the people in their networks are working out of an apartment in their underwear, and they really don't care. What they
do care about is that you don't make an ass of them by doing some really crazy ass promotion that makes them have to field angry calls from their clients, wondering why their Extra Special Edition Bibles are being promoted on dodgy porn sites. Secondarily, they want you to make at least
some money, because they take some (theoretically) amount of time to get you set up, and they will lose money on you if you don't make them at least a little.
A professional site goes a long way towards making them feel that regardless of what sort of crack fiend you might be in real life (and I say this to make a point, not because I think you are a crack fiend), you are at least capable of representing yourself well online, which is all they really care about.
Having a professional site
and email in the form of
[email protected] goes even further towards making you look professional, although plenty of honest to goodness professionals out there are using gm4il.
Most importantly, if at first you don't get accepted, try again! Never get bent out of shape with the network, simply contact them back, and ask why they did not approve you. Most of the time they will tell you. You can also just resubmit, and do a better job on your application.