If you lose a patent case...
...you have to do this. Paying for a patent to run software is a massive cost. For example, H264/HEVC costs you money when you buy a device that plays video, and that extortion is only limited because governments declared those patents FRAND.
Having said that, given that iOS7 was a free upgrade option anyway, Apple should have just put a downloadable iOS6 FaceTime app in the AppStore or something.
I'm surprised that their lawyers don't have all this covered in the EULA.
Biting the hand that feeds IT
