The reviews on Rotten Tomatoes are frequently purged of negative reviews and favorable critic reviews are promoted. This is likely done because there is a motivation to avoid negative reviews due to financial considerations. In short, if they let you see that a movie has a ton of bad reviews, you are less likely to go see it and the movie doesn't make much money. There is little doubt that movie houses and studios pay RT to prop up inferior products for the sole pursuit of making money.