FWIW, my father works for CDC and has met the creator of OnStar (recently retired after ~10 years of working on it) and my dad attended several very interesting workshops about it and the ways in which it informs crisis management and response plans. The creator wouldn't disclose the amount that GM has spent on it but hinted it is around $1 B. He also suggested that they price per unit is now very affordable and they are leaps and bounds beyond all the other auto manufacturers. He said he expects other MoCos to rush to produce and implement their own systems in the coming decade, many of which will license OnStar (now a separate company from GM, of course, now that it is profitable!).
It's a pretty amazing system and it should be standard on all vehicles.