As a seller on RPG Trader, you can use your earnings to purchase any product on the site.
Earnings become available for use and payout 14 days after the sale. If you have available earnings that you have not yet paid out, you can use some or all of them to pay for your purchases of products by other creators.
Using earnings at checkout
As long as you have available earnings (check your Earnings page in the dashboard to see how much you have), you will see a Use seller earnings box at checkout:
Simply enter the amount you want to use for this purchase, up to the order total, and then pay the rest using your regular payment method. If you use your earnings to cover the full amount, then there will be no additional payment needed.