#dailmemo: Here is an example of a decentralized, uncensorable website distributed over IPFS
https://gateway.ipfs.io/ipfs/QmNuGu4moPdCu3Rrnia77k3wDS2v4jLxmyiE68N7fGEDv5/
Can you sale listings on this that adhere to the OB protocol, where they can look unique and quite different from the official client but function just the same?
I think OB uses a fork of IPFS. They don't run directly on the IPFS network. If I'm wrong, then I think you could do what you suggest.
