I know for a long time that the best backlinks are one-way backlinks, however, I've been noticing there are a lot of really high pr websites are very active in link exchanges, as a result, even though their websites got thousands of outbound links, their pr survive updates! So, here is my thought: link exchange may not help your ranking (SERPs), but it still help your pr provide that all links you got are do follow links. Do you think it is correct? Please share your opinions.
Link exchange really boost PR?
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