PrintNode offers different plans that you can sign up for based on your needs. Most users of Printus would likely opt for the “Single Account” option.
If you are receiving less than 50 prints a month, then PrintNode is free. However, if you’re receiving more than that many printed orders a month then you’d need to upgrade to at least a $9 USD a month plan.
You can learn more about PrintNode pricing here.
When signing up for PrintNode you might receive a free trial of a paid plan. If after the trial you do not wish to upgrade your account, then you can contact PrintNode support letting them know that you’d like to stay on the Lite Plan. You can also switch between plans as your usage changes. You can contact PrintNode here.