Ok, I also tipped them so it was more than $1, but if you read the article on Eater and wondered whether it was for real, it is!
https://la.eater.com/2019/3/12/18250415/one-dollar-promotion-downtown-la-food-festival
Going forward, it’s a pretty easy app to use and there are a ton of places near my work that participate. Would I use it everyday? No, but I mostly bring lunch. But, it’s totally useful for those GC lines! My bag was waiting there for me with my name on it. I just grabbed it and left.