Twitter and Vine started using hearts instead of Stars & favorites.
In case you somehow missed it. Twitter has changed their star icon from favorites to a heart and calling them likes. Twitter said that this will be more rewarding to use. Not sure who thought the star was confusing. That said I am a fan of the heart. Sometimes I found myself holding off on making something my favorite. A like is much more relaxed somehow.
— Twitter (@twitter) November 3, 2015
Periscope is already using hearts so it was only a matter of time before they found their Twitter and its other social network Vine. Starting today you should have seen hearts on Twitter for iOS, Android, twitter.com, TweetDeck, Twitter for Windows 10, and on all Tweets that are floating across the Internet.