The main thing they want to know is if you are an actual marketer and not a fake it till you make it type. Make sure you can tell them about your marketing plan and sound like you know what you are talking about.
They will also most likely ask you about your traffic. Don't lie. If you tell them a site gets 10,000 visitors a month and it does not, they will see that in the numbers when you start sending their offers traffic.
Read their TOS very carefully. Make sure your business plan does not break any of their rules.