Who is donating to Wikipedia?

Donations to Wikipedia have exceeded 6 Mio in Januar this year after the pleaing of the Wikipedia's founder Jimmy Wales. Wikipedia was launched in 2001, so it is quite a good sum for the non-profit project, I suppose.

The motto on the Wikimedia page sounds somehow a bit pathetic:
"It stopped being just a website a long time ago. For many of us, most of us, Wikipedia has become an indispensable part of our daily lives."
Help protect it now. Please make a donation today.



It reminds strongly GreenPeace ads.

I am wondering who is actually donating money. I mean, private persons. Why donating to Wikipedia? Why not better help children in Africa? Are they impressed by the slogan? By the project?
I was trying to understand the idea. Here you can have a look at the list.

Donators leave their name quite often with the city names, so i have found some of them afterwards by Google. I am wondering about the persons who spend more than 50$ to Wikipedia. For example, there are some private persons who are spending about 100$, like Matthias Graf from Magdeburg or Christian Bahls from Rostock. Some people want to make SEO, they leave the links to their websites. but most of them are just saying "thanks" to Wikipedia.
People want to thank Wikipedia for such brilliant project, for much awesome information!
but I mean the information written on Wikipedia is written by other users for free, so you can say "thank you" by writing another article or translating. or you can donate the money for the person who has written the article that helped you. Then it would be more fair. Maybe this Matthiases and Christians don't understand that fact?

And how do you think?