Please note, that a payment subscription can only be made by an account owner.
To subscribe to payments please follow these steps:
Go to https://accountname.kanbantool.com/subscription/choose_plan
or: navigate to Account Administration - Plan & Billing details, then click on the click here to change your pricing plan link.
Select the pricing plan that suits your needs.
Click Activate subscription.
Then click on a card type, that you want to pay with.
Fill in your credit card details.
All done! Now the automated subscription will make note of the number of users in your account and will adjust the amount collected along with the users count.