Howdy
1) Only from accounts they refer and not more than 80% of fees, they pay. 20% always go to network.
2) BitShares.org and OpenLedger.io are only entry points (front-end or client, actually) to the same system. It doesn't matter, which one you're using in case of OBITS distribution. You hold your funds in account inside of BitShares BLOCKCHAIN, so no matter how do u like to access your account: either using desktop/web (like openledger.io or bitshares.org) client, or using console. You may even hold OBITS in LTM account and you won't lose anything.