Just have a look at
www.casinoaffiliateprograms.com and you will see some of the affiliates there with their websites. The content is of course different, with casinos the main tools affiliates have is to run contests or slots tournaments, provide exclusive bonuses and inform the players of new games (slots). There are a few sites dedicated to strategy but once you write the content once it can't change that much, an example would be
www.wizardofodds.com.
John