Sadly after checking it out again a few months ago after not using it for years, it seems to still not get any decent traction. As expected, unfortunately having something to be decentralized or non-custodial significantly hurts the UX.
anything decentralized that has to have the user do everything is going to suffer from pretty much the same problems and the biggest one is that people don't use them as much so that they can be improved (with their reports, etc.). OpenBazaar is similar to decentralized exchanges with the difference that unlike DEX people are less willing to spend their bitcoin than they are trading it.