Creating invoices and sending notification to the clients if they go over their Disk/Traffic limits is very common.

Why not put some magic here and write a 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:

1. Set price and create invoice
2. Send warning notification
3. Email customer
4. Suspend account

this and more in the next version 🙂