I would imagine it will depend on the area or market you are in. **BUT, My experience with any PAY PER CLICK is like a noose around your neck.
You will pay for each time a competitor clicks on it as well as those not really committed to needing a home inspection…also many clicks will be from agents just trying to price shop for their clients. And my experience with “Yelp” (and similar) was that you have no idea what the cost per click is going to be and or they put you in a cost bracket along with Real Estate Agents, figuring you are going to get 3-6% of the selling price of the home…just doing an inspection.
(I’m sorry, but most of these companies and the kids that call you are from the glut of college IT graduates that have been produced and have no idea what they are selling, nore do they have the knowledge or ability to actually set you up in a marketing program that works or gives you a reasonable return on your advertising investment).