Idk I thought because of newbies that were confused and might complain about cheaters, but I'm not sure if that's the reason. Stupid reason imo because hidden blip is cool. And if it comes back, please not only hidden blip when you're in a vehicle, also on foot. I can remember before it got removed you was only invisible in a car, which destroys the fun of sniping somewhere on a roof (number 1 reason for me to buy hidden blip).