I’m in the top 6% of Stack Exchange users, despite seldom contributing to the site. How? I got in early.
I didn’t do anything clever. I just happened to have asked a well-worded question seven years ago that’s been popular with Google searchers ever since. It helps that I got a great, surprisingly simple answer.
It just keeps paying off, a reliable karma trickle. Something like half of my reputation points come from the one question.
I think the Stack sites are terrific, btw. I now go to Stack Exchange first for questions on new libraries like Pandas, before I even go to the code’s own documentation.