Good point! On the other hand, I had heard some concerns about commoditization on Amazon (which strips away brand identity), and want to know how common / big this concern is? 

If you do, why; if you don't, why not? 

Shopify merchants - what opportunities or concerns do you see with a "marketplace / search engine for Shopify shops"? How could this help you with your shops, and how would/could you take advantage of such platforms (real or theoretical)?  As one exa...