For messaging apps, stickers have been a boon for a while. Line, one of the more popular Japanese messaging apps, is now letting its users sell their original stickers in Line’s web store. Called the Line Creators Market, the store is free for all users to register to. Creators can sell sets of 40 stickers at ~$1, once the graphics are approved by Line, and will receive half of the proceeds. Not only is the store a play to get at additional, popular in-app revenue streams, it’s also a move to increase user engagement and global expansion – sticker purchases accounted for 20% of the app’s revenue thus far, and sticker creation, which are popular globally, could be a way for Line to push its expansion beyond Japan’s borders.