Not really a hack, more like a thing that happened and made me rethink how much effort I was putting into the "active" part of job searching. I turned on open to work back when I was genuinely looking, then got an offer, started the new role, and completely forgot to turn it off. Didn't notice for a long time because I wasn't checking LinkedIn much.
About 8 months into that job I started getting messages from recruiters, a few a week, mostly noise but occasionally something that looked real. I wasn't unhappy at my job but I wasn't thrilled either, so I started responding to the ones that seemed legit, just to see. One of them turned into a full process and eventually an offer for a role that was a meaningful step up from where I was. The thing I keep thinking about is how much time I spent in previous searches doing "active" things - tailoring applications, optimizing my profile, researching companies, writing specific cover letters - and how zero of that was involved here. I just existed on a platform with a green badge and let inbound come to me.
I know this doesn't work the same for everyone, depends heavily on field and experience level. And I'm not saying don't apply anywhere. But if you're currently employed and casually open to something better, just leaving that badge on and responding selectively to inbound might be a lower-effort path than it seems.
The actual hack here is probably: don't turn it off when you accept an offer. Give it a few months. Worst case nothing happens and you turn it off later.