From a server infrastructure point of view, Kryptium uses the Ethereum blockchain network which hosts the smart contracts, i.e. the code that provides events, registers bets and settles them.
So "the system" is actually the blockchain network. Think of Kryptium like the bittorrent protocol for betting - there is no central authority or infrastructure but all clients can communicate with each other to share files (in our case to place bets).
Now coming to the "content", i.e. the data for events and their outcomes, it has to be uploaded to the blockchain by somebody (the owner of what is called the "oracle" smart contract). However, with Kryptium being a decentralised betting platform, anybody can choose to publish and maintain their own events!