I have responded to a few recruiters over time. But every job since the one I was recruited on-campus for in grad school came from reaching out to someone I knew at the company. (Not a developer but in tech.)

ADDED: I've been in a sufficiently specialized subset of the industry for a long time that random recruiter emails aren't likely to be interesting. And I know a lot of people at different companies. So I have pretty much a bare bones profile on LinkedIn as I'm not really looking for inbound pings.