I'm with COPEAC. Love em. Best thing to do is be honest. They just want to know how you will get traffic. No incent, social media (is ok sometimes)... SERPs, PPC... etc.
They may ask how you convert? Ads, Landing Pages (the best), etc.
They are a great network... if you plan on using blackhat tactics, do them with some other crappy network that you can afford to be banned from.
I can honestly say, it is the best "affiliate" network I've ever dealt with and made money with on a daily basis... good luck.