问HN：为什么还没有对LinkedIn的竞争？
如今社交媒体似乎有很多解决方案，但只有一个LinkedIn。我们为什么还在忍受它呢？我很惊讶到现在还没有出现竞争者，或者也许我并不知情，这可能就是问题所在；即获取足够的流量以实现网络效应的挑战。
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It seems there are many solutions for social media these days, but only one LinkedIn. Why are we still putting up with it? I’m surprised there’s not been a contender yet, or maybe I am not aware and perhaps that could be the rub; the challenge of acquiring enough traffic for the network effect to take hold.