I found out a lot of dumb people use msn, because they just find that site sooner or later. They often are easy buyers, buy at the first site that looks interesting. even though msn has a lot less traffic, still the amount of clients there can be good. and with the new msn, its not that hard to be aware of it during building.
Anyone ever used killerinfo.com got a neat little quick peek option, also it tells you where you rank in Google, msn, aol, etc etc Also a few years back there was another site the name escapes me but basically it mapped out results in a sort of 3D terrain, that was awesome.
I do computer repairs etc for home users. I'd say 90% of those who call me have their homepage set to whichever homepage their ISP has set. Pretty much 50/50 between msn and yahoo.