I believe it is less common for casinos to go with review campaigns and decide to launch advertisement/signature ones instead, because they can get feedback from participants anyways, specially if the payments are done through the casino wallet.
Also, perhaps the lack of a Web3.0 review-page/directory is due to the lack of referral campaigns from decentralized casinos.
We know that those pages try to pocket a buck with their traffic and if they cannot monetize it so easily (through referrals), then they would not feel encouraged to cover Web3.0 content as they do with Web2.
It's nice to see the man. Win signature campaign launched earlier this morning by Rose777 management which is a good move in the right direction, choosing Rose777 as their manager will help them get the best hands into their team and give the casino good visibility.
-Another way to promote the testing of their platform is by review campaign since that will mandate real players with activities on the casino to be able to give their review.