I used to call my local reference librarian so often, she knew me by name. I sent her candy at Christmas as a token of my appreciation. She was awesome. She's long retired but if she weren't, she wouldn't be hearing from me very often. (I once asked her to help me find out the termperature at which blood froze. "Why," she asked me after a long pause, "do you want to know?")
Now the first thing I do when I have a question about something is hit Wikipedia. Sometimes the articles posted there lead me to other articles. Sometimes I get lost in Wikipedia. It's time well spent.
So I sent them some money today. Money well spent. They're making it easy--linking to PayPal for one thing, offering an "other" option if their lowest suggested amount ($10) is too much.
(They even point out that if everyone sent in seven cents, it would be more than enough to fund them.) So, if you have a spare seven cents, or even seven dollars, why not send it to Wikipedia?