Netflix used a $1 million reward to upgrade its recommendation engine, while similar statistical challenges are hosted by the website Kaggle.

Netflix公司（全球十大视频网站中唯一收费站点）斥资一百万美元奖励能改进其推荐引擎的人。 同样，Kaggle网（一个众包①预测模型平台）主办了统计挑战大赛。

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Before launching any new website, feature, or upgrade, it has to be tested.

在发布任何网站、特性或者更新之前，都需要进行测试。

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But if they phase in accessibility as they naturally upgrade their website, they usually spend much less between 1% and 3%, he said.

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Bitcoins can be used in a host of legitimate transactions for example, website Reddit allows users to upgrade services using bitcoins and blog service Wordpress.com's store accepts them as a form of payment.

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Or when the shares of Books-A-Million, a retailer, rose tenfold within three days on the back of an upgrade to its existing website.

ECONOMIST: Michael Lewis