When my son was $3,$ he chewed through the top of his expensive winter Patagonia jacket that he received as a birthday gift. I complained to a friend about this, and she told me that for $$5,$ Patagonia will repair their produced items and the process is super easy. I was thrilled! I sent in my son's jacket, they fixed it$,$ and sent it back. All for $$5.$ The next year, when I was asked for a practical gift idea for my son's birthday, I mentioned that another Patagonia winter jacket would be wonderful! This is an example of $\_\_\_\_\_\_\_\_\_\_\_.$

Integrated marketing communications $($IMC$)$

Sentiment analysis

Homegrown monitoring

Customer stickiness