crimsonheadGCN said:It's pretty amazing. Steam might soon have a peak of 3 million concurrent users logged in (currently the peak is 2.7 million). I believe the service hit a peak of 2 million concurrent users about a week before Live did, which was in early November 2009.
It's really grown a lot over the last few years.
I'm not sure how meaningful that number is seeing how by default the Steam client stays active and logged in on your computer even when you are doing anything on Steam. I have to make a concious effort to shut it down every time when I'm finished and don't see any way to change the default behavior to shut itself down completly when I close down the main window.