Implement the feature to be able to upload the printscreen taken with your application directly to IMGUR. Since imgur is popular in the gamingworld it'll be a good idea to implement it.
Take all the credit, just make it possible. It's a shame that if you're in a current game, taking the printscreen you have to go to the folder click it up, upload it on whatever the individual want to. Im sure if you do this, and contact imgur they'll be happy to advertise Overwolf to their consumers.