Do you seriously think that ? My experience is so dissociated that I think it unbelievable. I don't remember ever seeing an ad for a small business on the web, even less discovered one through them.
I discovered most small businesses that I use through word of month, seeing them while traveling or active search through google or google maps. The ones that I may have discovered through ad where through local physical add such as any box fliers or fliers/posters in other local businesses.