I always wondered, is there a online transaction threshold level where you are forced to use these systems does anyone know? I imagine the amount of fraud cut down is fairly decent so there must be some break point for the merchant and/or the banks (assuming it costs a decent chunk to implement / operate this extra verification)

Both Steam and EA Origin will trigger a fraud alert. Perhaps Santander doesn't like gaming sites![]()
This, EVERY time. I don't get what is so hard to design a good system!
Been doing my nut in for years.