Now I'm confused (again).. 😒
I've read on other threads that HMC is essentially cashless for purchases from HAL activities (i.e. souvenir shops, bars, etc). And that cash is only needed for shops and trinket purchases from local vendors.
For the HAL sponsored purchases, your key card is used just like onboard the ship, and purchases are charged to your onboard account.
If this is correct, they are using computers to swipe your key cards, right?