If you look at Unity Software License Agreement 4.x and go to Embedded software restrictions, can some one tell it out in easier words. It’s difficult to understand. I think it means you can only have your game on 1000 devices. Is that what it means?
Less than 1,000 devices in which your game is embedded as the UI or primary functionality of that device. That’s right.
It doesn’t mean that only 1,000 people can download your game from Steam / Kongregate / Google Play, obviously.