Its a decentralized network, for example if one was to go down or just disappear , you just go to another and connect and all your orders and balances are there, unlike a single entity, if it goes down or closes you have no access, its like many doorways to a single room, one shuts, just use another, we are all portals, we all use the same order book and people can access that book from many doorways.

each portal operator is independent and over time they will add there own features and look to the portal.