I always think about LinkedIn as a "light scam". LinkedIn always pretended to help businesses and employees but indeed they don't do anything special to match people except for recruiters, which at the end it is enough with a search. To put it straight, it is not a Tinder for business.
I tried many paid services like Ads, Premium, and API. They are subpar. I recruit better via Reddit than via LinkedIn, you can post in a group with hundreds of thousands and it is a ghost town when nobody pay attention. they refuse API access for obvious uses, etc.