It's surprising on my end, but I heard a friend of mine say something similar to your post. I'm not sure how I managed to keep my LinkedIn as helpful if others are having this experience.
Mostly on my feed, I see articles about my industry and most of my engagement are from people interested in my business.
I do get messages a few times a month from someone trying to sell me insurance or "leads" for my business, but I get way more messages from business and social contacts.
So I hope the tide changes for everyone on Linkedin because it's really the only social platform crafted around business and career.