What are /r/GoPuff's favorite Products & Services?

From 3.5 billion Reddit comments

If you don't have it already, you'll want to download the T-Mobile Tuesdays app for Android or iOS. Most promotions in the app require a promo code that's unique to each line/phone number you have with T-Mobile. My guess is that you'll just add the free item to your cart via the Gopuff website or app, and then enter the promo code from the T-Mobile Tuesdays app at the Gopuff checkout screen to discount the promo item to free. Also, if you have multiple lines of service, you should be able to take advantage of the promotion with each one.