How does OpenBazaar differ from NXT decentralized marketplace? I'm contemplating if I should use openbazaar or the nxt marketplace. both a decentralized, but I have a few questions regarding openbazaar:


What incentive does hosting a openbazaar node give? I understand that the nxt marketplace is built into the coin's blockchain so there's the incentive of mining coins while it also hosts the marketplace.
How does openbazaar / nxt marketplace handle fees? Or is there any fees at all? There has to be some sort of fee I'd imagine or else there would be alot of spam. 
Can you upload images/pics to openbazaar/nxt ? How do they handle the bloat? 
How does user ratings work?
The NXT Marketplace is for digital goods. If you want to sell physical goods, you should look at the NXT FreeMarket, which also lives on the NXT blockchain. You can read about it here:

http://www.nxtfreemarket.com/