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Mysterious duplicate sales on Dreamstime

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Groucho:
From time to time (4 occurrences in 3 months) I had the same photo selling twice in the same day on Dreamstime. I do not complain  ;D, but I would like to understand this phenomena  :o.

I started uploading photos to Dreamsted 3 month ago and have a limited number of sales on it (40 sales for 300 uploaded photos). So, I don’t think it can be two customers buying the same photos on the same day.

Did you had the same kind of behavior on Dreamstime and do you have a rational explanation on these duplicate sates? Is it mistakes from customers, mistake from Dreamstime or a "gift" from Dreamstime ?

namussi:
Randomness doesn't always look random

"Poisson clumping, or Poisson bursts, is the phenomenon wherein random events have a tendency to occur in clusters, clumps, or bursts."

https://en.wikipedia.org/wiki/Poisson_clumping

BaldricksTrousers:
Maybe two designers in one office on the same project each download a copy, or perhaps it is to get round a usage restriction (i.e. only so many prints per download license - it could be  cheaper to get two individual licenses rather than one extended license). Or it could just be coincidence - the more images you sell in a day the more likely it is that a best-seller will go twice on the same day to different users.

namussi:
A search algorithm might put popular files higher up in the list of results.

So if your file sells once in a day, it might move up the list of results, and therefore becomes more likely to sell again.

niktol:

--- Quote from: Groucho on November 18, 2017, 05:42 ---Is it mistakes from customers, mistake from Dreamstime or a "gift" from Dreamstime ?

--- End quote ---

I always considered it all of the above.

Another interesting coincidence I often observe is a sale of the same rather unpopular image simultaneously on two different sites for the minimum amount possible. I think it could be related to an attempt to bypass licensing restrictions.

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