There are the three payment options available at this time:
Send paper checks to:
PO Box 337
Sun Prairie, WI 53590-0337
There should be a "View & Pay Invoice" button on the bottom of the email you received with the invoice. Clicking on this button allows you to view and pay the invoice by credit card, or ACH.
TransferWise (international payments):
We can send international customers a request for payment through TransferWise. If you prefer this method of payment, please let us know and we'll send you a request.
If none of the other methods work, this one will. Go to https://paypal.me/streamtext to pay with PayPal