这些免费用户的价值在哪里呢？
这将决定免费用户会向多少新用户提到这个产品。
This will determine how many new users the free users will refer. There are three levels of value.
他让脸谱网免费用户在转变时接受了一定的个人损失。
He has gotten his users to accept a certain loss of privacy in exchange for free use of Facebook.
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