Twitter replaces stars with hearts, but gets no love from users

Twitter Inc has replaced its star-shaped "favorite" icon with a heart-shaped icon called "like", the latest effort by the company to make its website more engaging. The company, facing slowing user-growth, joins Facebook and Google's YouTube in featuring "like" buttons, which have been popular with millions of users. Instagram, the photo-sharing app bought by Facebook in 2012, also has a heart-shaped icon for users to "like" pictures.