Correct me if I understand this wrongly but it's mentioned above that they are not an actual casino but a gambling reviews website, so they don't have the referral option.

Unless you wanted to be reviewed by them and give your referral link as bonus to them linking the readers to your casino while being generous paying for the review that they'll do. I think that's how it works if it's the other way around of what you're asking. Cmiiw.