In an article written by Dennis Yu he disses a new ad format where you can "like" you can share your likes with your friends.
This is a smart move by Facebook, as it makes ads less scammy (hard to cheat the system), emphasizes the core value proposition of Facebook ads (help multiply the love your fans already– among their friends), increases the value of their inventory, and increases Facebook’s ability to monetize.
See the whole article at:
Facebook Testing New Reviews Ad Format