Am curious right now, to know how does affiliates program work in gambling. I know gambling is big niche and they also run affiliate programs, so anyhow have an idea?
For an exact answer and not a general response, you need to check the Affiliate Program of each casino on their site.
Most gambling sites do have a certain page on their website about that program.
They have all the details on how to become a part of their affiliate program and how much revenue you can get. There might also be a special program where if a person is a verified influencer or a big person in the affiliate market, a special offer will be given.