(BBC) — Dating website OKCupid has revealed that it experimented on its users, including putting the "wrong" people together to see if they would connect.
It revealed the tests after the uproar over Facebook manipulating the feeds of its users.
"If you use the internet, you're the subject of hundreds of experiments at any given time, on every site," it said. "That's how websites work."
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OKCupid said one revelation was that "people just look at the picture".