It is — or at least was, before LLVM/Clang existed and before Apple's GPLv3 Eternal September — a good way for them to give away something with no actual strate

It is — or at least was, before LLVM/Clang existed and before Apple's GPLv3 Eternal September — a good way for them to give away something with no actual strategic value as a preemptive ideological rebuttal against their own use of Free Software in their otherwise-proprietary products.