We've done a couple of the reinstatements in the past years. They are often just about as much sales work as a new deal. Often the trigger is a change in management.
In the Bad Old Days, we got no commission on the reinstatement fee, and the normal, small commission on next year's subscription. Since there is usually not much in the way of services to us in a reinstatement, that was pretty unattractive.
Recognizing that some serious selling effort is usually needed to get old older customers to pay significant $$$ to come back is realistic.