I want to share a story about Ivan Zhao of Notion. I used to see Ivan at a coffee shop occasionally around 2013. I had just launched Keys Duplicated, a service

I want to share a story about Ivan Zhao of Notion. I used to see Ivan at a coffee shop occasionally around 2013. I had just launched Keys Duplicated, a service to copy your house keys by taking a photo of it with a phone. Ivan liked the idea, but hated the web site. He rewrote the HTML and CSS for me overnight. I liked his design so much that I re-launched Keys Duplicated the next day with his new UI. It left a mark on me that a coffee shop acquaintance would be willing to spend so much effort to help someone else without expecting anything in return. I've tried to pay the favor forward ever since.