I think the key to take advantage of this traffic is to present them with “exclusive” and/or “limited time only” bonuses. If you can drum up a handful of unique bonuses just for your site that offer more than the usual bonus, and advertise them as “this month only!”, change them around and make them different every month (and avoid no-deposit bonuses) that may work better. Everyone likes a bargain!
Plug! Can I also add that http://www.affcaff.com gives you (free) constantly updated bonus feeds too. There is now someone employed to check every bonus every month and update them for over 300 casinos. Will save you a lot of work – just 1 line of code for each casino and you won’t have to manually update the bonuses when they change.