在一个社交网络里，一旦现有用户的大部分联系人都已经加入同一网络，那么新加入用户给现有用户带来的价值就会呈现高原现象。

In a social network, the value for existing users of a new user joining the network plateaus once users have most of their own contacts in that network.

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因此，欢迎来到新的社交网络，一个由一队工程师搭建的梦想网络。

So, welcome to the new, new social, a network of people dreamed up by a team of engineers.

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使用激励来通过社交网络获得信息并非是一个新的想法。

Using incentives to spread information over a social network is certainly not a new idea.

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