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Everyone at the company had access to the whole Facebook code base and was allowed to make changes to the product without much oversight. All they needed to prove was that their edit caused a boost, however small, for some important metric, like time spent on the app. That allowed engineers and designers to work a lot faster, because there was less arguing about why or whether they should build something. Everyone knew that their next raise would hinge on whether they affected growth and sharing. They weren’t held accountable for much else.
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