That's understood, but what does 'funding' really mean here? There is no possibility of small donations paying meaningful salaries as VC could do. If funding of that sort is an issue (and sure, it is) then I'm not sure there's any good solution, but skewing the interface so that donations become more likely is not going to solve it (and can result in substantial loss of goodwill).
(I want to repeat to anyone reading, we're talking about *optional* donations here. The only discussion was about how it's presented to the user.)