As a reward as part of something else is fine and encouraged. We'll keep it nice and simple limiting sales to personal sites, and then having the option to give it away as part of, for example, stuff like Patreon and Kickstarter. That is why we are calling it "POWER-UPS" because the aim is to boost your work(s) and/or personal sites. We are going to have a complete document with everything outlined. The price will be set after the event ends, because if we have enough for an issue we'll set an issue price, and if it were a volume then you get what I'm saying!