Ohh a lot lol. My ex used to watch those that sell clothes to both gauge the industry(she's in fashion) and also buy something that she likes, and some of them do have pretty nice stuff. My cousin used to work on these that sell random household item and the sales is actually better than just listing it.
Personally not watching these but I think people just like to be "sold", like instead of reading the label about how good it is, someone is actually there to show you how good it is, and you can interact with them by asking question and get answer right away. Can't do it will store listing.