Creating Inovices and Send notification to the clients if they go over their Disk/Traffic limits is very common.
Why not put some magic here and write tool to automate this task?
Yes we did that! You will get a list of all accounts which reached their limits for Bandwidth or Disk space.
For each client you can:
- Set Price and create invoice
- Send Warning Notification
- Email Customer
- Suspend Account
this and more in next version