> It seems to work pretty well on HN or Reddit Perhaps it is because of the downvotes? >Facebook didn't have likes in the beginning and it didn't prevent them

> It seems to work pretty well on HN or Reddit Perhaps it is because of the downvotes? >Facebook didn't have likes in the beginning and it didn't prevent them from growing. Yes I agree, they have been growing steadily after introducing 'Like', guess we'll never know how much impact 'Like' would have made if Facebook didn't introduce them and if other social networks social networks had them.