It definitely makes a difference, and putting money into Wikipedia is a great use of funds. The reason I asked the question is because I’m not well off, but I still like to donate to projects from time to time. This means I have a limited (and strict budget), and was wondering if they need my tenner badly enough to send marketing emails over it. Because I’d like to donate to people who actually really need the money, and Wikipedia will do just fine for some time without my money going to them.