I think this has really interesting consequences in combination with the "pay money to send messages to people you aren't friends with" feature Facebook's been

I think this has really interesting consequences in combination with the "pay money to send messages to people you aren't friends with" feature Facebook's been testing lately. That's the revenue potential I immediately saw in this product with the demo search for "people who like cycling in my hometown"--you can find them for free, but it will cost you to contact (or direct market to) them.