I've read some of the reviews that are on Trustpilot, some of the negative comments came in concurrently, I wouldn't consider this to be a deliberate thing to do, however the reviews are mostly preposterous and they can't provide any evidence more. As an example is this review. Lately Rollbit seemed to be attacked by their competitors.

@Rollbit Razer, it seems it would be better if Rollbit had a representative who was always active on Trustpilot so that negative reviews by people could be clearly explained.