We went crazy with our money back guarantee. We had countless people whose 'dog' ate their product while still on the doorstep. One person said their cows ate $250 worth. Another person bought a few hundred dollars worth used from someone on a random forum. They all wanted a full refund. A newly hired email marketing coordinator mistakenly sent an offer for free product to 50,000 existing customers that was meant for a small group of new customers.
In every instance, we didn't think twice and gave them what they wanted. The outlier bad actors didn't make a dent when you looked at the entire business.
The philosophy that they were exploiting is what made us worth $1bn.