Paid attack is not worth it anymore due to top competition since there’s no guarantee that customers will come to them after successfully destroying other casino reputation.
Most of this negative opinion are actual experience or someone that being bust for abusing ToS that wants to revenge on the casino.
Well the paid attack on the reputation of the casino works differently. The casino may hire a team of social media influencers to start a campaign against the casino. On a small scale, a casino may hire few accounts here to place false scam accusation against the competitor casino.
However in both cases they won't reveal that who and which casino is launching these attacks and hence it is hard to find the casino doing the bad act. However if the casino is good, with the passage of time these false accusation will fade away and there will be more real positive reviews about the casinos by the genuine gamblers who gamble at the casino.