I have 8 Vehicles, Can I buy 8 Devices and and link them all to my account?
Yes. With Automatic Pro & Lite, there's no hard limit of the number of cars (within reason) that can be setup on one account. If you get into too many cars, the UI will be quite a pain to navigate. You can only view one car's profile (and live location if using Pro) at a time, but switching between cars in the app is pretty simple.