"Bitcoin developer Matt Corallo developed a Chrome Extension that adds a small “give bitcoin” link next to posts and comments when you visit Reddit. When user click on the link, it asks for authentication to your Coinbase account. Once user logged in to the account, they can send bitcoin tips on Reddit! The recipient will get a private message on Reddit with a link to claim their funds the first time they receive a tip. Future tips will flow right into their Coinbase account."