Strictly speaking, they have made zero sales at this point. Everyone's gotten the game for free, and some of us have tipped them, donating money for the pleasure. So there are no sales for them to honor. However, they do intend to grant the game to those who have donated above a certain amount if you look at the presentation mockup they published, treating those as sales.
The fact is, we got to play a prototype - almost a demo - without having to do much for it, and it was a ton of fun. I salute this notion, greatly appreciate it, and intend to back the Kickstarter.