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Discrepancy between user counts on Leagues versus Users page.

According to https://stackoverflow.com/users, SO currently has ~421k users. (I see 9x4 users on a page, with currently 11,710 pages1, which makes 421,560 users.)

According to http://stackexchange.com/leagues/1/, there's currently 619,716 users.

Where does the difference come from?


1 Note that this number is increasing by the minute. That's why I originally only gave a rounded number.

marked as duplicate by BalusC, Grace Note, sbi, gnostradamus, Toon Krijthe May 12 '11 at 19:55

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 15
    The extra 200K are Jon Skeets running on separate threads. – Anthony Pegram May 12 '11 at 19:46
  • 6
    Don't you know anything about quantum physics. Everytime you measure the number of SO users, you alter the result. – Lee Louviere May 12 '11 at 19:48
  • The leagues are so popular they entice an extra 200k users. – Hogan May 12 '11 at 19:50
  • So my follow-up question would be: What's an unregistered user? Since I doubt that I'm the first to ask that, could someone please direct me to a previous question, so I don't create another dupe? – sbi May 12 '11 at 19:55
  • Never mind, found it: meta.stackexchange.com/questions/68524/unregistered-user – sbi May 12 '11 at 20:00
  • I see you found an answer, but you might also consider this question, and this question, as additional reading for the pros and cons respectively of being an unregistered user. – Grace Note May 12 '11 at 20:01
  • @Grace: Thanks, those are indeed interesting! – sbi May 12 '11 at 20:08

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