It may be a no follow link but for local SEO like GMB it helps rank because of it's citation value which a citation is merely the mention of the business NAP (Name, Address, and phone number) some say website too but it's not as important as the other 3. No follow links also still can send traffic so it's beneficial but like I said as far as paying the value there is gaining audiences trust but if you're in business long enough you still can get a rating and gain trust.I heard bbb is a nofollow link now though
BBB.org is a pretty good citation source but you can add a business to it without paying it's just a little different per location.