For example I once couldn't figure out how to build a table right, and I hopped on the phone with their customer service department and they refund it half of the price of the table. The same thing happened where I had a monitor which 8 months after I purchased it started having problems, they just refunded half the price.
I'm pretty sure this only works for me because I spend at least $1,500 a month via Amazon, but even then it's business genius to operate like this. Many retailers would rather leave you out to dry, for example I purchased some shoes found they didn't fit and I was shocked when I simply couldn't return them. Guess I'll never go to that store again.