I went all karen(jk) on them in an email because of their app and lost points.
They responded saying they will mail me a coupon for one free large sandwich.
I accepted becasue I didn't expect them to do anything more anyways.
Received another email from them following up on my answer:
For context, I lost about 6400 points.
Rewards for Reference:
4000 pts - Cheeseburger ($2.59)
6000 pts - Junior Chicken ($2.99)
6000 pts - McDouble ($2.99)
10000 pts - Big Mac ($4.99)