It's a decentralised p2p (blockchain-like) platform but the main difference being that the consensus is decided by one central server designed specifically for smaller communities and events which can be online/offline (for eg. reddit/hackinout)
The main problem which we ran into was on how can we maintain an append-only log and also make it accessible to the users so that even if the trust is broken by the central server, the user has the power to deny the bogus transaction.
Discussion