I showed ngxtop [0] about 2 years ago as a top inspired tool to quickly check the status of my nginx servers, something I created for my need. I expected some people would find it useful and shared, turned out a lot of people need something to monitor their nginx servers and it got 3k stars in a day or two. So I built a much better tool to help monitor nginx and sell it as a product, Luameter [1]. It didn't take off like the other but now making a couple hundreds a month and being used by some high-profile users, i.e. well-known companies.

[0] https://github.com/lebinh/ngxtop [1] https://luameter.com/