What are the 'benefits' you alude to?
Mostly access to exceptional people / opportunities, and admiration / social status. For example, become a major donor to a wildlife rescue center, and you get invited to play with the tigers. I would be surprised if major MIRI donors that live in the Bay area don't get invited to dinner parties / similar social events with MIRI people.
For the status question, I think it's better to be high status in a narrow niche than medium status in many niches. It's not clear to me how the costs compare, though.
Activity in many niches could credibly signal high status in some circles by making available many insights with short inferential distance to the general public (outside any of your niches). Allowing one to seem very experienced/intelligent.
Moreover, the benefits to being medium status in several hobby groups and the associated large number of otherwise unrelated social connections may be greater than readily apparent. https://en.wikipedia.org/wiki/Social_network#Structural_holes
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Of course, for "every Monday", the last one should have been dated July 22-28. *cough*