Yeah, I was looking through the twitter feed of Sins and I found a tweet done on 17 Sep saying this, and I quote "When we hit 4000 likes on our Facebook page, we'll pony up an in-game screenshot of Rebellion. So ya know, like it".
If you look on the face book page you can clearly see that we have reached the above target of 4000. Therefore we are due for in-game screenshot.
. If the screenshot has already been released, would someone mind showing me the link to the image? If not then we are due our screen shot! 
tl;dr
Because we have reached 4000 likes on facebook we deserve in-game screen shots of Rebellion.