Another approach to 'grandfathering' is to announce an "end of life" for a service and give customers notice of, for example, a year. Chargify might have been b

Another approach to 'grandfathering' is to announce an "end of life" for a service and give customers notice of, for example, a year. Chargify might have been better served to "end of life" their free service, making it available to current customers for another year and closing it to new customers.