Especially for new or young networks, a lot of people are truly starved for engagement & don't see the pattern of being engaged with. Engagement has to be bootstrapped, by people individually deciding to look through & find & engage with others who are putting themselves out there.
The opposite of the curve shown here is the "who is engaged with" curve. And it's like 0.3% of people (made up number) getting 99% of the engagement. It's a tyranny of popularity, and it legitimizes everyone elses dead quiet, their non-activity. We ought engage more robustly. Not just with the popular magnets.