Over 10 years ago I was flying from a small airport in Ireland (I think). To get code for 30 minutes of wifi, you put 1 euro in an old school gumball machine an

Over 10 years ago I was flying from a small airport in Ireland (I think). To get code for 30 minutes of wifi, you put 1 euro in an old school gumball machine and received a capsule with a fortune cookie-like piece of paper. To this day I think that as the best experience I've seen for paying for wifi. It's usually free in airports now, but sometimes limited to 30 minutes. At this point you can simply change your mac address temporarily.