I met the founder of a successful service that builds landing pages for people and he said that startups aren't actually very good for them as they fairly quick

I met the founder of a successful service that builds landing pages for people and he said that startups aren't actually very good for them as they fairly quickly either go under or get a real site. Most of their business is for things like real estate, people running seminars, more small scale types of business than the kinds of sites you typically associated with landing pages.