Can foreigners get a card that refunds bus and subway transportation fares?

It works. The Everyone's Card (formerly known as K-Pass) is open to foreigners aged 19 and over. You must verify your address with your foreign registration number, complete identity verification, and register your card. If you ride more than 15 times in a month (from the 1st to the end of the month), you get a partial refund for the transportation fare. The rates vary by age and may change temporarily, so check the korea-pass.kr when signing up. If you don't get 15 times a month, you won't receive it that month. Check the conditions and exceptions on the EveryCard website (korea-pass.kr).