LinkedIn has never been that great for "searching" for a job the way you search for things on Google.
If your idea is networking and increasing your visibility to recruiters, you'll get more out of it. Recruiters are maligned. Many companies that are hiring people will create broken processes that are all too happy to reject people. A recruiter gets a commission when you get hired so, unlike many hiring managers, they've got a strong financial incentive to get you on board -- sure there are clueless recruiters who will waste your time but the right recruiter is your greatest ally.
We should be clear - they have financial incentives to get someone on board. Not necessarily you.
Connect with recruiters who take the time to ask where you would be a good fit. They are the ones who will call you in the future when you are a good match, and not waste both of your time when you are not.
To add, networking should include networking with recruiters because networking is a long play and the connectivity of a network is on the order of the square of the nodes.