I attempted multiple times to use my visa directly to pay with no success. The first attempt, my credit card company blocked it pending my approval. When I tried again, it did not work telling me it needs manual processing. Waited again, and nobody could get it pushed through. I then signed up for coinbase, loaded my credit card info into the site. Scanned the code given at checkout with Bitcoin from the invoice on the Redfox site. Put the amount of Bitcoin required into coinbase, bought Bitcoin, and scanned code to load info for payment to Redfox. Quick, and easy transaction!!
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