It is indicative of volume of users that are online and trading. So If you logged into open-ledger then this count goes up I think. I've never seen it this low before. Also peerplays is taken off from the front page as trade able asset. It's also running bit slow, charts don't make much sense. They are doing some upgrades to it and few things like this is falling through the cracks.
RE: what's happening to openledger?