10% Cash Back from FedEx shipping?

I ordered a Turtle Beach Recon Chat White Headset from the Microsoft store after redeeming $15 worth of Microsoft Rewards points and it was shipped to me by FedEx. I received the estimated date for the package to arrive and I was told it will arrive on Monday, February 22 from 8-11 PM, it is the next day and the package is nowhere to be found. I check the tracking URL and it says it is pending. I contact support they said they were sorry, because of the severe weather conditions it is running off schedule. They then gave me a 10% of the cash from the product to my account ($1), I am just wondering if it canceled my purchase, or is it a way to repay me for how long it has taken?

:)