There are paid reviews that are biased and are full of lies just to being up the other and bring down the other. Some casino owners pay people just to leave bad feedback on the services of their competitor casino. They would also try to pay people for positive review of their casino so they would have a clean and pleasant name to the community. Each casinos could definitely have some shortcomings. It will just depend on how they will address their players and potential players concern to establish a great reputation that could be trusted.
Still not sure about dirty competition tactic in several casino have scam accusation topic in this forum, based on they have detail proof I think possibility with casino gambling site have bad habit when withdrawing moment.