I'm just shaking my head, but not really in disbelief. We see this behavior by banks who refuse to allow their credit cards be used at Coinbase. They suggest they are "protecting" their customers. From scam exchanges? However, it really makes no sense whatsoever to not allow payment to a SCHOOL!
I know EXACTLY how you feel though. I had the same reaction when I discovered that as a Holistic Health (Alternative) business, I am not allowed to use ANY credit card payment service. Square and PayPal allow "my kind". But not the banks. When I researched the payment services for several banks, I discovered that the parent company was invariably Wells Fargo. I quit doing any more research. I refuse to do business with Wells Fargo. So it was mutual.
RE: Proof American Express Don't Want You Learning About Cryptocurrencies