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A UTC midnight after this happened: (I gained 90 rep in 15 minutes, I made this screenshot in between)

alt text

...I still have the 90 rep I gained this way. What's going on?

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I could freehand circle, but then I'd have to freehand circle the entire thing. – badp Jul 21 '10 at 9:16
you could circle each vote separately – Tobias Kienzler Jul 21 '10 at 9:46
I think you may have just hit a wave of new people digging through tags and questions and up voting what they like. – Tim Post Jul 21 '10 at 9:57
Wouldn't it be a freehand chain then, @Tobias? – badp Jul 21 '10 at 11:03
just draw many many free hand circles. – devinb Jul 21 '10 at 11:52

2 Answers 2

up vote 2 down vote accepted

Now the system may have changed, but a few months ago I've done some testing and this is what I inferred:

  • The system checks at midnight UTC if the same person upvoted or downvoted you 5 or more times.
  • If not, nothing happens.
  • If yes, the votes are canceled.

Since the script runs only once a day, the results are not instantaneous.

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5 is a very low limit, I often look at all quesions/answers by someone with a common interest to me and upvote the good ones. – Ian Ringrose Aug 20 '10 at 12:03
@Ian: I don't disagree, but that's what I observed when I did my testing with throw away accounts. I also tried on a stack exchange 1.0 where I was admin, and it was the same. I may have done something wrong and I can't say I'm 100% certain, but I am highly confident I've done the testing correctly. – Andreas Bonini Aug 20 '10 at 13:10

Maybe in beta the serial-vote mechanism is less sensitive. Also, you can't tell whether all the votes were made by the same person, it could just be coincidence. (Like in 1:3600 or so, but it has to happen some time)

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