What stops an appointment setting company from booking junk roof inspections just to hit a number?

Nothing structural stops it unless the contract defines what counts as a real booked inspection, so that definition is the part to read closely. If a company is measured only on how many appointments it sets, volume is the only thing that matters to it and weak appointments follow. What protects you is a written standard every appointment has to clear, plus your own weekly look at which inspections actually got walked. Ask what happens when one fails. Lead Engine writes that down as a seven checkpoint Appointment Standard, commits to at least 6 shown residential or 4 shown commercial inspections a week, and replaces anything that misses the standard at no charge.