google is much more popular and widely used than msn, I have yet to see any traffic from msn or yahoo even though my pages are indexed by them all
it all depends on the keywords u r using! I have a traveling site i use to promote on msn and it worked out pretty good.
hmm.. Use the Live Webmaster Tools and see ? I think, getting Traffic from Google is Enough for any site
As a Microsoft AdCenter advertiser you can use this link to get an estimated keywords search volume: https://adcenter.microsoft.com/Research/KeywordResearcher.aspx However, based on my own experince i found that dividing Google's search volume based on 'Adwords External Keyword Tool' by a number between 4 and 7 is usually close to MSN's numbers
Here are SE traffic stats for one of my websites with relatively good traffic: Google - 95.4 % Yahoo - 2.3 % MSN - 0.2 % During the years, I was never getting significant SE traffic from MSN, so your experience with 8% seems so high fro me... or maybe my websites are not optimized for MSN...