Do you feel there was a certain threshold you passed which made recruiters see your profile and start contacting you?
E.g you passed 10k score or won some gold badge in some framework?
Hard to say in hindsight. I’ve been getting contacted by recruiters mentioning my SO profile for more than a decade, but I’ve also been active on Stack Overflow since the very beginning, and earned a lot of reputation very early on (and much less since). I’ve since dropped of the first page of top users (second or third now) but I can’t tell whether that’s led to a decrease in contacts (it probably has but that’s been balanced by an increase due to seniority in my field).