Comment by amluto

That doesn’t contradict my point. Apple could achieve two goals here:

1. Allowing GPL code in a lightweight and compliant manner at a essentially no cost to Apple.

2. Adding a class of free (or paid) open-source apps that are more trustworthy. If Apple could effectively replace a decent fraction of the free shitware apps on the App Store with better free, open-source apps, the value to end-users and hence the value of the platform would increase.

There is no requirement in the GPL that recipients of source code be able to run modified versions of the code on the target device.