2020 Card Sales Fell by 31.8% When Compared to 2019  In-store physical card sales declined least, QSR segment fared best    Newton, MA– February 3, 2021 – Paytronix Systems, Inc., the most advanced digital guest experience platform, today published the Paytronix Annual Restaurant Gift Card Sales Report: 2021, which finds that overall, 2020 card sales fell by 31.8%…