Cashless and Privacyless at the Festivals?

The QR-code attached to your festival wristband functions increasingly as a means to manage your drinking and eating coupons. What does “cashless” mean for our privacy? [ENGLISH & NEDERLANDS]
The QR-code attached to your festival wristband functions increasingly as a means to manage your drinking and eating coupons. What does “cashless” mean for our privacy? [ENGLISH & NEDERLANDS]