Disclaimer: This post is not based on fact, it is based on an assumption that has no evidence, whatsoever.
A thread over at DigitalPoint forums named Call From Yahoo/Overture shows a funny call Shawn received from a cold caller at Yahoo! Search Marketing named Lisa. The call shows that Yahoo! folks are calling from a database of names with inaccurate information, or simply not well trained to cover up the poor data in the database.
Based on the conversation posted at the thread, is seems like Lisa is getting paid in piecemeal. It seems, as if they are paying folks on a PPC basis (Pay Per Call) to sell PPC (Pay Per Click).
Honestly, I doubt this is true, but I wanted to use it in the title of the post.
Forum discussion at DigitalPoint Forums.