Warning! this app runs in background even when closed – National Car Rental Review

I work in IT and was capturing web traffic to troubleshot an issue. I was surprised to see 70% of the web traffic was going to a National web site. Even after an uninstall in continued. A reboot was required. I had not used the app in months. I can not imagine the impact on my data and battery. I also wonder what they were collecting.
Review by Philadelphia_Person on National Car Rental.