They do pay -- they pay per click, just like Google advertising
. So Keen makes money off of us when we call, as well as when we click on a featured advisor link. Each time you click, no matter if you call.
So one time a while back I was mad at one of the advisors and sat there clicking her featured listing a bunch because I was petty

lol
(PS it works like this on all sites that have featured advisors)