Why don't you just find a creditred sports forum site and join up there maybe do what you're doing on here, make sure you create a signiture!
I think with your site, you will not find too many people reading up on how to gamble... You may find some people trying to figure out how to become better at the games you provide. Try to write a few how to articles and post them on various article sites. Also, you may find it better if you promote via advertisements.