No. Automatic Pro is a one time purchase and does not require any additional fees or subscriptions. All you need is the Automatic Pro adapter, the free Automatic app, a supported smartphone, and a compatible car.
For legal reasons, we have to provide a time limit on our offer of free cellular data. This is why we state "No subscription fees for 5 years” with Automatic Pro. We currently have no intentions to ever charge for 3G for Automatic Pro.