Is it true that there are a lot of affluent surfers visiting MSN, so it is always a good idea to make one's articles or website MSN-friendly to sell an affiliate product?
When it comes to search people normally thing of yahoo and google. They forgot live search. That's kind of dumb on their half, as live search holds a nice chunk of the search traffic.
Because people forget it, the competition is far less and the PPC on that is way cheaper. It would always be a good idea to make sites for the big 3.