I worked for a company that offered a software product that was paid on a monthly subscription. Since a number of the companies in this industry were seasonal,

I worked for a company that offered a software product that was paid on a monthly subscription. Since a number of the companies in this industry were seasonal, we made it possible within the software to make their own license inactive. No phone call was necessary, but they could if they wanted. So as long as their license was inactive they wouldn't be charged. If they reactivated their license they would start being charged again. They would also immediately get any updates they missed out on while inactive.