If some casinos offer even small surcharges or just bonuses to some author of a gambling review site, such an author will still agree to post positive information about this casino. But there is also the opposite - some kind of casino can also order anti-advertising of competitors. And also for money. As a result, all information will be so distorted that it will not correspond to the objective picture of events in the casino world at all. So none of the gambling review sites can be trusted.
Nowadays, there is no more solid trust for gambling review sites, either. After reading some of them, it became apparent that most reviews were biased and unreliable. Because, for example, some reviews are not even written by the real gamblers, but by salespeople of gambling websites or other people who are hired to write them. Other review sites were just copied from one another. So it's hard to rely on any of the reviews written by these review websites. So, apart from using reliable gambling review sites, one should also try to check out more sites which try to be more objective, in order to determine what actually is a reliable source of information.