The internet and social network companies of Silicon Valley enjoy one of the world’s most attractive business models. Offer a free service, collect personal data, use it to lure advertisers, and expand seamlessly across the US and around the world to millions of users.
硅谷互联网和社交网络企业拥有世界上最吸引人的商业模式。提供免费服务、收集个人数据并用来吸引广告商，然后顺畅地扩大至美国各地和全世界的数百万用户。
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