51 million Skypers in China

I read the following: China becomes Skype's biggest market with 51 mln users, yet to make profit.

As usual, let me correct this statement: they mean “registered user names”, not "registered users", and this isn't equal to "active users".

Like i do usually, let us assume the numbers are however correct, this would mean that:

• 20 % of the active Worldwide Skypers are from China
• 3.9 % of the population of China are Skypers
• 5.4 % of the “active” population of China are Skypers (discounting people older than 65 years, and younger than 14 years) [EDITED ON 25/11: The number in red was edited, as i made an error in my calculation]
• 34 % of Chinese internet users are Skypers

Bear in mind that the second, third and fourth numbers above are very exaggerated. Reasons are:

• lost password, and therefore inaccessible user name, therefore the need to create a new user name
• testing Skype, and abandoned use of the user name
• spare user names, registered for alternative or future use (i have several!)
• the owner of the user name died (yes, this also happens!)
• the person switched to another VoIP tool
• the person registered a temporary name for a temporary past situation
• spammers also register multiple usernames to "attack" their victims

So, like always, this 51 million users statement is marketing exaggeration!