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According to Greg, there are 93,861 registered users in the data dump. However, on the SO users page, there are only 74,620 people (2132 pages * 35 users per page). How is this possible? Does the data dump contain deleted users? Is there a way to keep your account from getting listed on the SO/Users page?

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3 Answers 3

up vote 7 down vote accepted

I'm guessing SO user view doesn't count anonymous users (the Unknown (Google) ones) in its user list, but the data dump obviously has to include them.

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Didn't even think about that possibility. –  TheTXI Jul 9 '09 at 20:03
1  
That's why they pay me the big bucks, TXI. –  XMLbog Jul 9 '09 at 21:12
    
yes, the /users page is only registered (non-cookie-based, OpenID) users –  Jeff Atwood Jul 24 '09 at 4:24
    
Hadn't noticed Jeff's stamp of correctness until now. –  Timothy Carter Aug 24 '09 at 18:17

Abandoned accounts are removed from the database as detailed on the blog

We delete cookie-based unregistered accounts when:

The user has not visited Stack Overflow in four months
AND
The user has less than 100 reputation

We delete OpenID registered accounts when:

The user has not visited Stack Overflow in four months
AND
The user has only 1 reputation

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1  
Are these users in the data dump? –  Timothy Carter Jul 9 '09 at 20:32
1  
I'm under the impression they are - but I don't know for certain. –  Chealion Jul 9 '09 at 20:39

They probably cleared up a lot of duplicate accounts

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