how competent do you have to be in SEO to run an SEO business? I see a lot of these "seo companies" get their clients just normal backlinks that anybody could get. You know, yelp, citysearch, all these directories. Nobody seems to be using PBNs (understandable since you don't want to take any risks with a client's site) I am sure the clients start seeing some increase in traffic, but is that enough to keep them onboard? The reason I ask is I am comparing different businesses that I could start and the recurring income from SEO makes it better than the other businesses where there is no recurring income. Like if you get one client and they keep paying you $whatever per month, that would make you rich quicker than let's say web design where you just design the site for a one time fee and you never see the client again. so the question is: how do these SEO companies survive? like I said, there is nothing special about the backlinks they get. I could get those backlinks too. or clients don't care?