The BBB is supposed to be the epitome of integrity and trust. However, that is far from the truth. Check them out online and you will readily find that no organization has quite as many complaints as they do. They have been exposed as a fraud and scam by major news entities. In fact their business model is to defraud and deceive.
The fact is that no one regulates or grades them. They would certainly have an F rating. However, they can tarnish any reputable business person's reputation. If you do not pay their membership fees they will take any complaint against a business, be slow to remove bogus complaints and flat out give you a bad grade as a standard business practice.
Beware consumers and business owners. Consumers, how can you trust a BBB rating when it is bought and paid for? Bussiness owners be prepared to be slandered if you do not pay the membership fee. this is their only source of income and all they care about.
In sum I would advise you to regard the BBB as an outdated criminal enterprise. Consumers beware!! Business owners beware!! Wether you are in the automobile sales industry or any other industry beware of this rip off agency that unfortunately people rely on for legitimate consumer education and advise.