With Cloud Chat 3 - Version 2.0 we have implemented subscription based packages. Therefore the client can be charged automatically and his account will be extended with it.
Now to have a fully functional subscription system we will need to setup a webhook in your stripe account.
Please add the url to your webhook file (https://www.yourdomain.com/include/stripe_hook.php), where yourdomain is your actual domain. Select the three Events like on the screenshot and save. That is all you have to do, Cloud Chat 3 will automatically create plans, subscribe users, create coupons, unsubscribe users and send an email before the customer get's charged again.