Digiconomist on Twitter: "The chart shows one #Bitcoin transaction versus 100,000 VISA transactions, because any less VISA transactions wouldn't even be visible https://t.co/hxqSQaad6K" / Twitter
Credit Card Transaction Processing Basics
Visa Transaction Controls
How Credit Card Processing Works - Transaction Cycle & 2 Pricing Models - YouTube
What is the difference between American Express and the other credit card companies, such as Visa or Discover? - Quora