[robocat]

StackOverflow is “open knowledge”, so I enjoyed adding to it as I helped many people in the world. I am not involved with open source. I was very careful to be correct and what I wrote was often unique knowledge, although it was often about browser quirks so what I wrote has mostly become outdated.

If I were employing a developer, and the developer linked their StackOverflow account, I would definitely judge the quality and quantity of questions and answers. “Farming” reputation to use as a reference requires a lot of skill and judgement.

There is only one person in the top 30 at place #15 that has been using SO less than a decade: https://stackexchange.com/leagues/1/alltime/stackoverflow

I know one of the top ten, and I would employ them (although I would be surprised if they choose to work with me).

The question of activity can be answered because SO publishes data. For example, the StackOverflow user database can be queried using https://data.stackexchange.com/stackoverflow/query/new for LastEditDate, as a proxy for user activity. Or grab the raw database and work out activity over time?

(edits)