關於nofollow，Zac和國平老師都刊發了自個兒的觀點，它們兩個都說了一大堆，Zac老師覺得nofollow會耗費PR和權重，國平老師覺得nofollow會耗費PR。

　　它們的例子都是這麼：如果你原來有一個頁面PR值有10點，這個頁面中有10個鏈接。nofollow之前每個鏈接分到1點的PR值。假如你nofollow掉那裡面5個鏈接，你以為餘下的5個鏈接每個鏈接能分到2點的PR值，不過其實，每個鏈接仍然只能分到1點PR值。

　　它們兩個的根據都是Matt Cutts的那段英文：

　　So what happens when you have a page with ten PageRank points and ten outgoing links, and five of those links are nofollowed? Let’s leave aside the decay factor to focus on the core part of the question. Originally, the five links without nofollow would have flowed two points of PageRank each (in essence, the nofollowed links didn’t count toward the denominator when dividing PageRank by the outdegree of the page). More than a year ago, Google changed how the PageRank flows so that the five links without nofollow would flow one point of PageRank each.

　　原文：