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Inktomi recently had an update where their algo seemed to change a lot. They have set out to have a much more relevent [webmasterworld.com] database. They are updating about every 3 to 4 weeks. I have seen huge swings in their algo during these major updates.
Be interesting to see what happens. I assume the idea is to improve the algo, clean out some spam, and use the better results to build some more partnerships outside of MSN.
Thanks
[edited by: agerhart at 5:02 pm (utc) on Oct. 2, 2002]
[edit reason] deleted specifics [/edit]
At some time they decided that they had to include more pages (for free) if they wanted to stay relevant. As a result my site when from essentially 0% traffic from MSN to around 12% of SE traffic. Though I am obviously delighted, I can clearly see the unfairness of it.
For an example of someone else whose traffic went down drastically (though much earlier than the inclusion of free listings) see the post on Inktomi (PositionTech) PFI Performance Report [webmasterworld.com].
We are on the first page of GOOGLE or within the top 15 or so listings under all of our key topics so I don't believe there is anything wrong with our pages.
Some of the pages that are way ahead of us now in placement are totally irrelevant to the subject and there is nothing that I can find to determine why.
Gil
The idea may have been to get as much in there as they could this month and then to start sorting it all out. I imagine there will continue to be shakeups in the SERPS through to the end of the year.
Not the way I would have planned the expansion, but that's the best guess I can give as to what happened.