Hi 27,
similar situation here years ago. I finally ended up putting up a disclaimer that i did NOT recommend the place and then I provided alternative options offering same/similar games.
Sadly I was amazed at how many still clicked on the link going to the casino I didn’t want to promote: i finally ended up taking the link out completely stating that if people wanted to end up being sorry .. they would have to find the site on their own as I was not going to contribute to what i knew would be a situation that would leave them sorry in the end.