Twitter now offers stickers for subscribers to use on pictures
Twitter now offers stickers for the photos that you Tweet
Back in February 2014, BBM started offering stickers to be added to messages. While BBM wasn't the first to offer them, it still counts on purchases of sticker packets to help monetize the app. The latest social media star to give its users the ability to use stickers is Twitter. Users can go through a number of stickers, select the ones they want to use, and place them on top of photos. The stickers can be resized and rotated to make them fit better.
Some Twitter subscribers are not impressed with the new stickers available to them" 
source: Twitter
Things that are NOT allowed: