Mary, my own URL for my stand alone shop is from godaddy and it used to be redirect to Etsy but now it's redirected to my supadupa shop. I just noticed this as I was wandering their FAQS and I'm not sure what it means. Before I ask them I wanted to get your opinion so that I ask the right question. This is the FAQ:
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Will I increase my Google rankings by having multiple domain names?
No, you will not increase your Google rankings by using multiple domain names. Your SupaDupa boutique has one Primary domain name, that any additional domains you own can redirect to, but it is the primary domain that Google will consider in its ranking factors.
This is done so that you are not penalized for having multiple identical sites and so that Google does not get "confused" about which one is the Primary or authoritative site.
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Does this mean that I should be creating all of my backlinks using their URL instead of mine? Geez, I hope not.