Only really works for some types of goods, though. Someone selling e.g. end-grain wooden cutting boards would require a very spacious booth to demonstrate their particular skill. Someone selling stained-glass pieces would require a fume hood to make any permanent progress! Someone making scented soaps? Legally, you need PPE to be within 50ft of the process!
It's pretty much the only way I can be assured they're not (exclusively) selling dropshipped items.