I am planning to start charge 50$ fee to add any Casino since I need to pay for employers to research on internet for the casinos reputation background in the internet, play the casino to ensure we know what we talking about in the reviews and by last all takes time!
It is neither good nor bad but you may earn profit buy using referral link as earning by bestchange. But for that reason your site must have to popular, and to be popular you have to spend time as well as money. If you charge 50$ or something like this then you may get few fund but that will not be good for long term. Non reputed site might be interested but reputed site may deny your offer.
There's no need to be famous, but it is indeed a plus point and an advantage to get more viewers,... I suggest to add Ads if they didn't have any, I have a friend that has a website and he's making money tru that but it wasn't that much, but I think it could help a bit. Or they could also ask some several casinos to advertise them in their site...
Also , I thought this thread are a list of sites that gives Casino Reviews, LoL.