$FB ~80% of Facebook users have never purchased a product or service due to advertisements/comments. (Reuters/Ipsos poll) "Poll: Facebook ads not working on most users" [LA Times - 6/5/12] http://www.latimes.com/busines...#MyStock
I haven't purchased anything based on ads (clicked on a few), but I have purchased festival tickets, paid for music/dance events, and donated money based on posts/comments. I have made purchases based on FriendFeed/Blogs/Facebook posts. "Food pictures" are great incentives to shop/dine... :-)
- Mitchell Tsai