I have a marketplace platform we can use called www.Peerhub.com.... It was my first startup in 2014 to give sellers an option to use Bitcoin. It's on the backburner and not much activity although I do get one signup every week without doing anything... It's not decentralized, but I was actually going to use it for BitCash. We plan to be a 1:1 bridge between SBD and BitCash, but I can just add SBD as an additional option too. I was going to make a few changes and add services to the marketplace.