1. Log into OnFrontiers at https://onfrontiers.com/login
2. Go to the Team tab > and click the gear logo for Team Settings
3. Click the Credits section on the left of the page
4. Select the number of credits, see discount & total amount.  Here's a reference on how many credits to buy.
5. Click Purchase
6. If no card is available on file, you'll be prompted to add one
7. We'll promptly charge your card or bank, load the credits to your account, and email you a receipt