Yes. All the dual logo devices still work, It’s just that without an active contract it doesn’t call the monitoring center.
The official supportbase FAQ:
What can I do with the ADT Security Hub?
The ADT Security Hub allows you to monitor and control certain smart devices using voice commands or the SmartThings Classic app on your smartphone or tablet. You can automate connected devices in your home and set them to turn on or off when doors are opened, as people come and go, and much more. (Connected devices sold separately.)
You can also enroll in optional ADT Professional Monitoring Services to provide emergency contact services to keep your home safe from smoke, fire, extreme temperatures, carbon monoxide, and intrusions.