I scraped a large sample of data from the Sonos community and reviewed what percentage of contributions the top 20 members are responsible for.
It’s not precise, but the broad picture is in these two images below (click to enable images):
The top 20 members collectively contribute around 31% of all posts.
If the top 20 members are responsible for 31% of the community’s value, it’s not illogical to invest 31% of your time, available budget, and energy to supporting and nurturing this group of 20 members.
And if one member is responsible for 9% of all value, nor it’s logical to invest 9% of your resources on that top member.
Likewise, you probably don’t want to spend more than 31% of your time on this group. That’s another trap entirely.