Many of the chapters are still in "startup mode" - a challenge that the WMF
should avoid when targeting organizations for sponsorship or donation.
Perhaps more saliently, OSM, MariaDB, Internet Archive etc. are not
representing the Wikimedia movement, aren't using Wikimedia trademarks,
and presumably would receive a much, much smaller portion of their total
operating revenue from the WMF than chapters typically expect. All good
reasons why the WMF should not treat them in the same manner as Wikimedia
chapters, user groups or thematic orgs.