

I see OPs point. I donate to Wikipedia, because I love what they do and want to support them. If they decided to put up pay walls, my personal feelings on their model would alter. Even if I got access as a doner.
I would no longer be inclined to donate, because I would no longer believe in what they do.
Your point is a good one, though I’d like to point out that electricity is so useful that if I have power and water in the room (and a bit of prep time) I can make oxygen.