The seasonal menu changes every eight weeks; the counter cards should not have to. Point a dynamic EverQR code at the current menu, swap it when the pumpkin things arrive, and see whether the window sticker or the counter card gets more scans.
Seasonal menu swaps without reprinting
Loyalty program sign-up at the register
Scan counts per placement (window vs counter)
Enter your destination URL at EverQR, pick Dynamic QR, and download your code as PNG or SVG, with your logo and colors if you like.
The code encodes a short EverQR link that never changes, so it keeps scanning correctly no matter what you point it at later.
Your private management link lets you change the destination and see scan stats: total scans, per-day, and top countries.