Maybe their engineers were lazy or rushed by management, and didn't keep things organized, so GPL code, proprietary/internal code, potentially-patent-violating

Maybe their engineers were lazy or rushed by management, and didn't keep things organized, so GPL code, proprietary/internal code, potentially-patent-violating hardware documentation, and secret keys all got munged together, and they figured it would be cheaper to fight a lawsuit than to carefully untangle the terabytes of junk so they can hand over the relevant code without having their digital asses hanging out. The possibilities are indeed endless.