bill - 4:19 am on May 16, 2013 (gmt 0)
Regardless of whether the licenses are being actively used 100M were sold according to the report. That's the way MS usually reports these things.
I haven't come across anyone IRL who has taken advantage of a Windows 7 downgrade. I'd bet that number is an order of magnitude smaller than when Vista offered the XP downgrade. With Vista you actually had an OS that required some heavy-duty hardware to run well. Windows 8 requires even less resources than Windows 7 so there isn't as much of an impetus.