I think it's really hard for that to be true, they would be easily discovered if a dev refused, and told the public about this bribery, and there would be a big backlash from the community here, and they would be banned... I believe the updates were denied because the update had already been reported, and it was already in the testing phase (to check if there are any viruses or anything malicious in the game scripts), the games as far as I know, are tested in sandboxies to see if there is anything malicious in them before they are posted.