Thats good for those who loves decentralisation. Unlike other marketplaces, theres no need for any identifications and other stuffs that are really annoying. I think it will be a hit marketplace in the future since not anyone wants their identity exposed.
You need identity.. both projects have them and are needed for feedback and auditing purposes. Syscoins is native to the platform and offers multisig capability while ob uses third party idenity platform last i checked
For anon you can use zcash payments