It's interesting how these money laundering checks works flawlessly for regular people and businesses but always seem to fail when there are hundreds of millions of dollars involved.

Optimistic explanation: businesses that handle millions of dollars probably have way more transactions than regular people, and thus have a higher chance of triggering a false-positive on some random blacklist.

It's probably trying to avoid the opening of many accounts, all under 25$, as an attempt to transfer a lot of money but still fly under the AML radar

Your solution is to make obeying the law illegal?

Do you think Paypal enjoys spending effort to prevent itself from collecting fees?