The Port has a great (and easy) printing system.
Each Member is has the option to have $10 in print credit per month at the Port Workspaces with a one-time, $25 setup fee.
These do not ‘roll over’, but simply replenish themselves up to - but not past - $10/month. In other words, you will never be below $10 at the start of every month. If you need more during the month, you can simply:
1) Login to your Papercut account
2) Click the ‘Add Credit’ link (left menu)
3) Select your amount.
4) Pay with either your credit, debit or Paypal account:
The credits which you add carry over each month on top of your allotted $10.