Most poker affiliates run one or two sites and earn money from sign ups or conversions to their sites. I use what I’m dubbing the make money online trifecta.
I make money from domains, ad sales, and conversions. I sit on a portfolio of over 1k
domains and sell only when I get a sale thats worth my time and investment. If I buy 10
domains at $70.00 and 9 aren’t so great and a guy offers me $80.00 for the one domain that is good, I just say no until I get $300.00. I’d rather just sit on a couple of the good domains from that batch and let a few expire. Then I’ll take that $300.00 and buy a script to run on another good domain I have. Then I make money from ads and conversions on that site.

I also make money from selling poker ads on all my sites. Banner sales can be a great way to make money with a poker site. I just sold a banner for 150$ per month
on one of my poker sites. Think of that in terms of real estate. You need a 100k property to earn 1k in rent per month. Figure in taxes, mortgage, and all that crap, you lose money sometimes. However, you can start a poker site for 50$ and pay server cost of 3-10$ and earn $150-$400.00 off it per month after a year of working on it.

I recommend doing all of the above. Buy and sell domains, sell ads on existing sites you own, and promoting poker with your own banners and links.