Allow cheap software
Well known examples of proprietary software register Microsoft Windows, Adobe Outburst Speculator, PS3 Operating Modus operandi, Apple Inc iTunes, Adobe Photoshop, Google Earth, Mac OS X, Skype, WinZip, and some versions of Unix.
Software distributions considered as proprietary may in actuality amalgamate a “tainted provenience” model including both unconditioned and non-free software in the same distribution. […]