The article sort of conflates two different models. Dollar Tree is actual "everything in the store is a dollar" while Dollar General and Family General are mostly small retail stores that sell things at a variety of prices. They round prices to the dollar, but otherwise are traditional retail that just locates in unusual locations. Five Below is another "dollar store" in that blend, focusing mostly on goods for young…
Talented authors who drove retail bookstores to stock their inventory. But when some of it didn't sell, the dollar stores snapped it up for nearly nothing. IMO that's not a slight to the authors. It's to their credit that the bookstores saw their promise based on existing sales at the time.