Whew! Rest assured, these big companies are so poorly organized that they would never be able to do something so sophisticated as link a negative comment back to a user (and then punish them). Staff too busy taking coffee breaks and attending motivation meetings.
Just a thought, do they have different business membership levels? Seems if they are asking you to add business URL, they are assuming you are a super big business and need that? Maybe other levels require less and you just need to change your status?