This sounds very similar to Etsy or Amazon Handmade. https://www.amazon.com/Handmade/ https://www.amazon.com/Handmade/ I imagine companies like Shopify could

This sounds very similar to Etsy or Amazon Handmade. https://www.amazon.com/Handmade/ https://www.amazon.com/Handmade/ I imagine companies like Shopify could easily compete in this market too by curating stores that use their service.