My father owned a small business that this happened to. Not Grubhub but a "yellow pages" type site set it up. The contact information was correct, so we didn'

My father owned a small business that this happened to. Not Grubhub but a "yellow pages" type site set it up. The contact information was correct, so we didn't think much of it. The site went down after a short period, most likely whomever was funding it ran out of money. In his case it was a speculative sales tactic.