Sad thing it is the bank I use the most, so I will be paying in some way for this heist. Either in the formj of reduced interest rates, or in increased service fees or a limit on the services offered.
Apparently many of the transactions were not online, but were done because many foreign banks use a cheaper offline mode so the transactions do not run through immediately, but are delayed until a batch is run at the end of the banking day, or the following morning.
Here in SA there is a lot of bank fraud, mostly preying on the gullible and either using a card cloner to get the magstripe info or making a copy of the card front and back to do card not present transactions, or by simply doing a card swap at an ATM and convincing the mark into entering the PIN so it can be used to empty the account.
Saw it done to a police detective ( brazen buggers) and in the 2 minutes it took the card division to answer the phone ( known thieves at the ATM across the road) they had taken all the money out of his account at the ATM 300m away. Arrested and free the next day doing it again, though I saw them arrested, and also saw a newspaper article about them active in another area, and phoned the investigating officer to give her the location of them ( prison) so she could carry the cases she had on them further.