Honestly, I understand that the opposite way. The payment account is still your wero account, that obviously has every transaction you’ve done with them saved, and not much else. Meanwhile the payment source would be your bank account, and they clearly state that they only save the account holder name (your name), type of payment source (presumably bank account, credit card, debit card, … in case they ever want to reach feature parity with PayPal) and a technical identifier, which would be your account number, card number, …, possibly (hopefully) hashed and secured in some way. I still in no way see any I dictation that they’d extract your previous transactions, or any transactions done directly from your bank account

I would assume payment account in this case would be similar to eg a Paypal account. As in, they can obviously see the transactions you’ve done with them, and they will keep them saved, but I don’t see any reason why they would gather all of your bank account history