It's our new currency. It does everything the old one does, and more!
And yes, you can still use it for vBookie.
The one we were using before had a security vulnerability. All of our existing balances should have carried over.
The new credit system is very robust. Some would say it's a little too realistic. We may have to make some "market adjustments" as we go to make it easier to use, but did anyone ever think it was easy to start up an economy?