I have one suggestion: for the browser test mode, allow invalid CC numbers (or, provide a test CC number), so one doesn't have to go and find and type in a real

I have one suggestion: for the browser test mode, allow invalid CC numbers (or, provide a test CC number), so one doesn't have to go and find and type in a real-life credit card, to try it out 4242424242424242 with any three digit number for the CVC