Some ideas for increasing revenue in this case: 1. increase the unique value of the physical game package; include a T-shirt, stickers, something that makes po

Some ideas for increasing revenue in this case: 1. increase the unique value of the physical game package; include a T-shirt, stickers, something that makes possession of the package worthwhile to someone who's played the game long enough to identify with it; mention this addition in the intro or scores screen. 2. Run a contest on the scores server; if you are one of the high-scoring players this week and you can send in the code printed on the bottom of the box, then you get the reward. For greater psychological investment make the reward personalised with the players nick/score/rank on it.