What should I watch besides visits to the QR?
Besides the visits, what is watched is which photo is enlarged, whether that dish lands on a ticket and whether any table says it did not match. The visit alone does not say whether the image helped the order. Across three services note one enlarged photo, one dish ordered and one complaint that it did not match. In Madrid only the QR counter is watched and nobody knows which image is opened. From those services it remains which photo was seen, what was ordered and what did not match.