It also depends on how you advertise and what the casino uses to incentivize the player. If you attract people looking for freebies and the casino advertises free, no deposit bonuses, you will have a lot of signups but you will have to bring a lot more traffic in to get deposits than if your player arrives ready to play with their own money.
You have to ask yourself what the people coming to your site are looking for, and whether they find it on your site and on the casino site.