"We’re a small non-profit with costs of a top website: servers, staff and programs. Wikipedia is something special. It is like a library or a public park, a temple for the mind where we can all go to think and learn. When we founded Wikipedia, we could have made it a for profit company with advertising banners, but we decided to do something different. Commerce is fine. Advertising is not evil. But it doesn’t belong here. If Wikipedia is useful to you, take one minute to keep it online and ad-free another year."