The model is simple enough to explain in one breath. A homeowner needs a retaining wall, so he searches "retaining wall contractor near me," and up comes a company with a local-sounding name, a local number, a nearby address and a reassuring stack of five-star reviews. He calls. What he may not realize is that he isn't necessarily calling a retaining-wall contractor, he may just be calling whoever owns that phone number. That distinction matters more than it sounds like it sh