I've gotten a lot of free stuff from Amazon. Shipped duplicate products to me? Just keep the other. Food bottle slightly cracked and leaked in transit? Keep it and we'll send another.

I was even able to get another 30% off an already sale price for a Kindle because my old one (>5 years) died, and they couldn't fix it.

Not justifying any particular actions on their part, but their customer service has been above and beyond and other major retailer I've interacted with.