Saffron - 12:41 am on Jul 5, 2013 (gmt 0)
A much better scenario would be 3 players (google, bing, yahoo?) with a total market share of about 60-70% and another 7-8 smaller players with the rest of 30-40%.
Absolutely. I've seen first hand the financial ruin having one search engine can cause to a site/business. One year you're their sweetheart, next year you're in the gutter.