Valve has the best business model. It's essentially a 3rd party App Store where you can have access to it across Windows, Mac, and Linux. If I buy something on Windows with steam, I can download and use it on Linux. If it's compatible. <br>This is how phone App Stores should be. If I buy 1 version of the software, I shouldn't have to buy another version because I'm on a different OS.<br>Which is why I don't buy anything from the Windows Store, as that is locked to WIndows only.