Check your account mine have been added
The aztec code on the offer page is just your Subcard number - it's the same one as is on the "my Subcard" page of the app.
I didn't opt in to anything, just went to Subway and had a random 500 points added to my account, must be this, because I have the offer on the app. Heat.
If you don’t scan the code on the offers page you won’t get the extra points, made this mistake yesterday, completely forgot and just got basic points!
Same here, no extra 500 points showing. Offer said they would be added within 48hrs