I have noticed the same with the $100/mo plan, I hit the limt only once with heavy usage. Then when I use my employer's AWS Bedrock it's not uncommon for my spend to $50/day of serious work. It doesn't make much sense.
Nothing can stop the tower equipment manufacturer like Ericsson from knowing the location of your phone and cooperating with advertising or mobile tracking compainies to aggregate that data in useful ways. If you have a phone, people that want your location have it and there is nothing you can do.