Hello Wayne and welcome aboard. Fair question and I am sure you won’t get lynched for asking.
There are a number of CAP members who operate on a paid placement/fixed ad model so I will leave that answer up to them as it’s their specialty.
I will make one comment though. To be most useful and fair to your visitors I would suggest you evaluate the casinos based on reputation and performance and build your directory with that in mind.
I understand the concept of being complete and listing all without prejudice, but there are so MANY online casinos that provide extremely shoddy support or will actually rip off players you could inadvertantly be adding wood to the fires.
By listing all casinos you actually create a mine field for your visitors rather then a better service.
I won’t preach, but its something to keep in mind…
Good Luck