Re: I never really understood "save payment details" options
Well, if they don't include that check box by default, they can get in serious trouble with their credit card processing company.
Last time I was involved with it (which was over 10 years ago) you had to destroy the information no more than 60 days after the transaction was completed (including you receiving the money). I don't imagine that number has gone up. If you have a cockup like this, it's only bad PR and sodding users you piss off. If you don't have that check box you'll get your credit processing dropped immediately. That's some serious bad karma.