If this is the product of "someone with a lot of free time", then maybe we should abandon free open-source software in general. What a waste of time!
I also go to a lot of tech meetups and give tech talks. I'm ten-years married with no kids. I can spend my time how I choose. Only I have something to show for all of my evenings over people who only play games or read click-bait. I want children, eventually, but I'm not ready yet. I'd also like another graduate degree, and I'd like even more experiences in finance, as now I've only been a financial advisor and worked in risk data and architecture.
I had over 150 answers on tax and retirement planning on all-experts.com with strong ratings, and they've deleted that material because it's out of date, and now I just have a line on my old resume (it's not even in my current one). I like that much of my material will not be dated as quickly on Stackoverflow.
From the point of view of his manager, it depends, and it may count as a negative if his manager thinks working to maintain that 'top 3%' status might affect his focus on his job.
Then what does 'Contributes a lot to open source' say or 'Knows several programming languages'? Because people often like those and yet it requires as much free time as answering SO questions.
I hate that this is considered a negative.
It's very easy to be 'busy all the time'.