Common practice for a casino which doesn't have any budget to market their casino well. But they failed to realized that hijacking some big casino's thread will not give them any good impression since people will just ignore what they are posting or think about they are a fraud since they have done their marketing in wrong way.
Legitimate casino should really not participate on any cheap ways of advertising since they will also get a cheap impression so to those people who plan to launch a casino they should do more better than this so they could get more serious costumer that will participate on anything they offer.
Whenever I see a casino or any other site doing that the first thing that comes to my mind is to ignore them and try as much as possible not to use their site - because if they were decent they won't have been hiding in the shadows of big sites they would have come out from their hiding place and show everyone what they have to offer.
Trust me, if that casino should open an ann thread you'll see that there will be so many newbies in their thread trying to praise the site - because such sites are capable of using multiple Alts to write fake reviews in their thread tk just attract customers.
Well, thanks to that user the site if now a part of my ignored site.