You do realize most of these payment processors or even financial institutions have arbitration clauses right? And as a business, they have the legal right to refuse for any reason not disability related. Hell, they could deny a disabled person a loan based on the unlikelihood they would pay it back and then hide behind KYC/AML laws. Oh we're not denying you based on disability, it's just some flags have popped up in our system and we can't tell you why. Google doesn't have KYC/AML laws to hide behind.
The funniest part is that HSBC already revealed to criminal organizations on how to evade KYC/AML tripwires. When you outlaw freedom, only the outlaws have freedom.
It's a bit akin to all those people who complain it's impossible to know why Google closed your account despite evidence [1] to the contrary.
[1]: https://www.huffpost.com/entry/why-google-bothered-to-ap_b_2...