I've done something similar.. some years ago there was a casino I would go to where you would pay 10$ entry fee and have access to a buffet, for the whole day. They had great food too. So I told an uber driver this "hack" and less than 6 months later they started checking whether you were playing or not, you needed a special ticket to access the buffet. Now I have no idea if me not shutting up about it has caused it to be closed off but there's certainly a chance.