You should clarify that you might not get the game for $1. I signed up for it and this is what I got. For a dollar I don't really care but some people may.
Your one dollar will be exchanged for a brand new game as soon as we collect at least 10mln pre-orders. However, do not worry! If we don’t succeed in our goal the income will be donated to the charity. So go and spread the word about our campaign, give us a ‘like’ on Facebook and keep in mind that we need your help to achieve our aim. The only way we can sell you the game for one dollar is if we don’t spend thousands of them on the promotion. We also encourage you to keep an eye on new press releases which can be followed on our website, facebook or twitter