My industry is IT, and I have heard posting on the groups is a great way to get more exposure, but from my experience they are like ghost towns.Just an idea:
Offer free content, make them subscribe to a newsletter. You can monetize the newsletter with ads, premium subscriptions.
Also, it great to post on LinkedIn groups for more exposure.
https://taplio.notion.site/21-highly-effective-content-templates-for-linkedin
https://taplio.notion.site/97-linkedin-hook-templates
Could you explain?LinkedIn is a great parasite to be used.