Launch limited-time promos. People love these things. I don't know why. I think it caters to the hoarding instinct. Give people exclusive levels or badges or o

Launch limited-time promos. People love these things. I don't know why. I think it caters to the hoarding instinct. Give people exclusive levels or badges or other bonuses if they download within a time period. These don't have to be prepackaged with the installer, they can be delivered later, depending on the installation date.