Isn't it well known for example that banks have some rules or algorithms that flag potentially illegal activity, and those rules are secret? Revolut just tells

Isn't it well known for example that banks have some rules or algorithms that flag potentially illegal activity, and those rules are secret? Revolut just tells you your transaction is suspect and it will take more time to go through, or just tells you you are suspect, and your account is being closed. They don't tell you what the rules are and which one you broke. Or if Google thinks you are cheating on ads somehow, they just ban you with no information. Intentionally, so you can't construct a cheat that avoids the cheat detection algorithms. This has been discussed at nauseam, and you're saying it doesn't sound true. More importantly, what exactly do you think "secret" in "secret service" means? Or "classified" information? Are you actually arguing that these things don't exist? Do you think while the location of secret agents is a secret, the hiring rules and the training and the infiltration strategies are public? Go try to find them.