Unlike many other companies, PopItUp doesn't charge you a monthly subscription for printing shipping labels from home.  PopItUp uses a Pay Per Label approach so that you only have to pay for the labels that you print, and the more labels that you print, the less that you have to pay per label.  Here is a helpful guide to how much each label costs: 

The per label fees are added to the USPS postage due for the label and deducted from your POP buck balance on  your account. We offer the best postage rates available from the United States Postal Service (USPS), Commercial Plus Postage Rates. 

You can read more about PopItUp Shipping labels on our blog: 

USPS Shipping Labels from PopItUp

Save Time and Money Using PopItUp Shipping Labels