The ability to back charge clients for services and access to the app when cards decline.
Clients who wait to update their payments should be back charged for the access. When the client gets kicked out and signs back up they essential receive access for the days that their payments don't go through. I have a client who took longer to update her info because she couldn't do it on her phone through the app. We had to resign her back up which created a new due date. She rarely accesses the desktop version. I would've updated her payment information for her but that doesn't seem possible either.