Some people here think Wikimedia Foundation's mission is to keep Wikipedia up. That's a subset of their mission. I attribute nearly all of the blame to WMF, because their donation ads are quite deceptive.
The actual, public mission of Wikimedia Foundation:
> The mission of the Wikimedia Foundation is to empower and engage people around the world to collect and develop educational content under a free license or in the public domain, and to disseminate it effectively and globally.
As such, WMF spends a lot money (combined) on a splatter of projects, like funding photographers to go to events like Fifa World Cup and Cannes, and take (CC or public domain) portraits for Wikimedia Commons (https://www.wikiportraits.org); etc.
The actual, public mission of Wikimedia Foundation:
> The mission of the Wikimedia Foundation is to empower and engage people around the world to collect and develop educational content under a free license or in the public domain, and to disseminate it effectively and globally.
As such, WMF spends a lot money (combined) on a splatter of projects, like funding photographers to go to events like Fifa World Cup and Cannes, and take (CC or public domain) portraits for Wikimedia Commons (https://www.wikiportraits.org); etc.