“Ghost Kitchens” have a more nefarious connotation than “delivery only” though because often it will be a single kitchen yet be advertised as many distinct restaurants. I saw one in one major city that was something like fifteen “different restaurants” operating from the same small space, which is sketchy.

But I think the person to whom you’re responding was relying more on the word “thousands” here. So given the connotation I think opening thousands of these things is pretty sketchy for some random YouTube personality with presumably no experience with restaurants to be opening simultaneously.