Why doesn't facebook just ask what people want a price break on? To hell with all the machine learning, etc. Just ask. Put out a form for asking what people intend on buying, and have advertisers bid on keywords and offer price break coupons through facebook. Not that hard to do.
I wonder what this means for Adpinion. If this works for Facebook, will ad-voting become more mainstream? If so, Adpinion is in a pretty good position.
Or do they feel like Facebook is stealing their idea?