How does this apply to eBay or Newegg? I've written about how we've lost a lot of smaller independent websites and everyone has to have a store on Amazon/eBay/Newegg/Reverb these days:

https://battlepenguin.com/tech/the-death-of-the-mom-and-pop-...

I imagine this wouldn't affect eBay since it's clearly a site where you are buying from a seller. eBay is more of a newspaper listening. But what about Newegg or Reverb which try to create these tight models just like Amazon so you're not always sure who exactly you're buying from? Newegg even does the "sold and shipped" by newegg (it's not clear if these are actual products from newegg inventory or if they are leasing warehouse/inventory pipeline like Amazon).