Sorry for the confusion. Yes, Addoway is a marketplace and a noted eBay alternative. Addoway is a partner of SaleHoo so we are confident in saying that they are legitimate and a good site to sell at :)
Here is our partnership announcement: Link hidden: Login to view
I believe some of your questions are covered in the link above.
For additional information here is a quick review: Link hidden: Login to view
Hope this helps!