Gshaughn - 5:04 pm on Jun 1, 2010 (gmt 0)
I posted my CTR data at the end of April from Wbmstr Tools, and still think the introduction/weighting of CTR as a criteria has A LOT to do with Mayday, but wanted to share a couple recent observations:
1) Last week I purchased banner space on a high traffic forum in a complimentary industry looking for some referral traffic. The banner ad's alt text was set to reflect the image ad 'blue widget quotes', and is also a competitive keyword phrase. (The image actually reads 'new blue widget quotes', the alt text is just 'blue widget quotes'). The site was ranking #15 for the keyword phrase (#5-#20 consistently for years). Today, the site is not found for that term (cached today).
Coincidence, or filter/penalty? Could this be a 'penalty' for advertising on that site? A penalty for using slightly different alt text? Are images being 'read' and compared to alt tag values as a means to police the use of alt text and over optimization? Thoughts?
2) Site hit hard by Mayday had a lot of external back links from sites owned by the same company (same registry info, same host/nameservers) but unique IP's. We experienced a severe drop to the kw phrase that was used as the anchor text across many of these sites. Could be that link value/authority evaluation has changed (whether do to an incomplete re-indexing of back link profile, or stricter/smarter analysis of external linking sites).
Did anyone else that got hit by Mayday build external links from sites they owned or that were in the same registry/hosting account (despite unique ips)?
3) Site hit hard by Mayday has a large % of external back links to the homepage. Not much distribution to other internal pages. Is this a commonality in the back link profiles of other Mayday victims?
Just wanted to share, please let me know your thoughts or any similar observations.