All of the games work great on Mac, Windows, and Linux. We didn’t want to leave anyone out.
There is no middle-man. You can rest assured that 100% of your purchase goes directly to the developers and non-profits as you specify (minus credit card fees).
Your contribution supports the amazing Child’s Play charity and Electronic Frontier Foundation. By default, the amount is split equally between the seven participants (including Child’s Play and EFF), but you can tweak the split any way you’d like.