OneMarket is nothing special at all, anybody can create a classifieds website to list items for X coin, and have a script into the wallet displaying the listings on the website...it piece of cake and nothing special...the real problem with something like this is the incentive to use such a thing... why should I sell my things for cloakcoin, this is the real question...I can sell them directly for Bitcoin in the near future on eBay...
Year after year the fee's for selling items on Ebay has become even more and more ridiculous. I'd venture to say that people are tired of paying Ebay fee's and Paypal fee's. Ebay is a greedy company. And every move that they have made has been out of greed and for profit. They've cut off 3rd party payment processors and have forced people to pay using Paypal. Would I sell my items for cloakcoin? Absolutely. Because even if Ebay implements Bitcoin they will just add in an additional fee.