My grocery delivery was 2 hours late. They said they'd give me one discount but gave me two. I should probably tell them but I'm keeping them.
What a pain!  I think when a big company makes so much money and they say they'
Well I kinda feel bad because they essentially gave me $40 off an $80 order. 
Oops, sorry, I didn't finish my thought.  I think they make enough money to handle it and that inconvenience is worth $80.  Plus now you'll definitely buy again with them so I think it works in their favor and yours!