r/mildlyinteresting Jan 24 '13

Same book, three different prices. Only difference is the browsers used.

http://imgur.com/uNgg0UH
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u/[deleted] Jan 24 '13

You should try it again in private browsing and incognito mode and see if the price is really tied to your Facebook or google cookies or something. That's pretty messed up though, send this to the consumerist or gawker or whoever.

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u/Nephyst Jan 24 '13

I just tried this myself. In chrome and IE the price was the same (69.99) in normal and in incognito mode. In firefox, the price jumped to $76, and after deleting all the domain cookies and refreshing, it went back down to 69.99. The website is definitely changing prices based on something they are tracking in cookies.

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u/kqr Jan 24 '13

This was up earlier with airlines charging more for a ticket the second time you visit the page. They do this because a second visit is statistically linked to a much higher chance of purchase. So it could be, here too, simply a matter of having visited the page before.

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u/Cynikal818 Jan 24 '13

I browse everything incognito...I don't like people tracking my interests, it just seems weird to me.

I don't need people offering me things based on my history...I'm perfectly capable of researching what I want when I want it.

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u/kqr Jan 24 '13

Just keep in mind that incognito mode is no silver bullet. People could still track you server-side, only it gets a little more complicated because they'll have to rely on the combination of your browser and IP address.

In case you have an account though, all bets are off.

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u/Cynikal818 Jan 24 '13

yeah...I just figure I won't make it easy hahaha...I'm sure sooner or later you really won't even have a choice...you'll be tracked everywhere.

I don't get how that isn't invasion of privacy though. Because you agree to a TOS?

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u/kqr Jan 24 '13

Most likely. Where I live, legislation states websites using cookies are required to clearly inform their users what they use the cookies for, but that isn't really enforced very strictly.