Re: The Ongoing PageRank Massacre Hits Big Players
One possibility is that the internal PageRank scale changed, which had to happen and will continue to have to happen one way or another as more and more pages are added to teh interweb.
Also, if the internal to toolbar PageRank formula is non-linear and possibly something similar to logarithmic, pages with higher toolbar PageRank would automatically appear to be harder hit.
Lastly, it needn't appear to happen to every single site in the high PageRank bracket because during the period between April and when those site's toolbar PageRank dropped, some of the high PageRank sites could have received enough new inbound links to put them off the charts, which could also explain why and what was done in the first place.
All guesswork of course but a shifting of the internal to toolbar PageRank scale has to happen at some point anyway or all the pages would be fighting for fewer and fewer PageRank resources or, all bunch up making PageRank less worthwhile as a signal, and that point may be now.
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