There's lots of money to be made there - in your examples, the people selling used vans (and then re-buying them cheaply from new companies going out of busines

There's lots of money to be made there - in your examples, the people selling used vans (and then re-buying them cheaply from new companies going out of business), and the internet megacorps selling advertising to all the dog groomers trying to be heard. In a gold rush, most of the miners get nothing, but the people selling shovels can have a good business.