[Tpt]

I don't think they where ever Wikimedia Foundation staff paid to work on Wiktionary, Wikibooks, Wikiquote, Wikivoyage, Wikisource Wikispecies, Wikinews and Wikiversity. So, these projects cost to the Wikimedia Foundation the hosting (probably around ~100k/year at most) and some other small cost (trademark, some community support). Wikidata is developped by Wikimedia Deutchland that is an other organization than the Wikimedia Foundation and has its own fundraising. So, I believe that if you donate to the Wikimedia Foundation nearly all your donation is going to Wikipedia.