houben77,
Warren gave you some good information.
A few other things to maybe look into:
– are the keywords you’re targeting good converting words or just traffic generating keywords?
– does your site include all the deposit options for the casinos you are promoting? if your readers are aware of the depositing/banking options it may help convert into sales when they are signing up.
– are you showing lots of traffic and sign-ups through the casino you are promoting, or are all the stats next to nothing? if you are seeing close to 0 on all the main stats you might want to check with your affiliate managers to make sure everything is working properly on both ends.
– you mentioned you don’t feel super comfortable with the sites you are promoting, maybe do a little more research to make sure you are promoting trustworthy casinos so you get paid.
Just a few extra thoughts, but good luck with everything!!