"As of December 31, 2010, there were 647.6 million active Tencent QQ IM user accounts,[1] making Tencent QQ the world's largest online community. The number of simultaneously online QQ accounts has sometimes exceeded 100 million.[7]"
How does google stack up against Facebook in numbers? I don't mean Google plus specifically but I've always been under the impression that anyone signed up with Facebook probably has a gmail account.
>> "I've always been under the impression that anyone signed up with Facebook probably has a gmail account."
Why do you think that (seriously asking)? Gmail didn't become available to the public until 3 years after Facebook launched (admittedly Facebook was initially limited to certain groups of people). Before I signed up to Facebook Hotmail was still very popular with everyone I knew, mainly because they all used MSN Messenger. It's only been in the last 2/3 years or so I've seen most of the people I know default to Google when creating an email account. Up until then Hotmail was all people really new.
The Yahoo uniques are not all authenticated users, so this is a very different comparison. Facebook is counting only people who have registered for an account, logged in, and then did something.
