How about using tracking link? As I can remember, some casino use a link called by tracking link on their ANN thread so they can get the statistic about how many players come from the ANN thread.
I have no idea though how they create the tracking link but I think it is not that hard for experienced dev behind a casino.
Related to the rule of ref link, I have to agree that it should be modified or maybe there should be an exception especially for official casino representative so they can use it for their evaluation.
To jump in — referral links and tracking links are pretty much the same thing, or more precisely, a referral link is a specific type of tracking link.
A tracking link is the broader term — it refers to any URL used to monitor traffic, clicks, etc. Referral links fall under that category, usually tied to affiliate programs or campaigns. Creating one is usually a very simple task — unless you're doing some heavy analytics setup.
Alright, back to the main
topic of the thread now — the SEO side of me kicked in for a moment. 😊