What you're always dealing with in those categories is deceptive websites, claiming to be a "business" although they have no employees, no location of business, no stock, no services -- all there is, is a website that takes your personal information.
Now, the website might happen to turn that information over to some pseudonymous or anonymous real business (which might actually fill your order). Or the website might simply charge your credit card and pocket the money. Website reviewers can't tell which, of course. It really doesn't matter, both kinds of websites are equally deceptive. And both kinds of website creators are constantly trying to make their websites look like the websites of businesses that actually exist. At the same time, honest business owners naive about online scams are creating sites that don't really give enough information for a surfer to check up on the business.
The combination makes editing extremely difficult. Ideally, a local editor would drive past the address and check out the building. Actually, that usually doesn't happen. But without that, how can you tell which are the businesses and which aren't?
Obviously, editors learn some techniques, which shouldn't be discussed here. But the problem makes editing in shopping categories more painful and less productive than some other kinds of editing.