Reviewing the metrics ... usersif we look closer at metrics we may get the 50 millions user mark by november numbers due in early december. Switching from Silverlight with his capacity of 16.1 million users for Azure Cloud platform bring infinite possibility
Metrics:
9 april-9 may 15.3 millions unique users
30 may switch to Azure Cloud platfrom after max out capacity of Silverlight
July 20 millions unique users
August 26 millions (30%+)
September 32 millions (24%+)
October 40 millions (25%)
November if we get another 24%+ it bring number to 50 million users
so december numbers could easily be 60+ millions
All that said in the release they take care to say there is no mobile metrics include in these numbers IMHO