a) 3 meals prepared for me saves me time and money. I love to cook but I don't have tons of time anymore and I don't have a a good kitchen. If I want to save time via delivery I end up spending tons more, and I don't think I eat as healthy.
b) The food was ridiculous. I've eaten a lot of good food, I've eaten in numerous countries, and Dropbox's food was god tier.
c) Tons of snacks, little treats, etc. Wine as well. Given the incredible quality of the food I wouldn't be surprised to find that I was eating quite a lot in terms of money.
It was such a quality of life win, especially as someone who loves food, to just have insanely good meals every single day. Even if ultimately it probably saved me closer to 1000 a month than 5000.