Отчёт Википедии о результатах фандрайзинговой кампании — Fundraising 2010/Banner testing: a personal photo and appeal was far more effective than alternatives (via http://ff.im/tRA8u) - http://meta.wikimedia.org/wiki...
“Since August, the Fundraising Committee has been running a fundraising test each Thursday afternoon for one hour. These tests are helping us to get all of our systems in order before the hectic fundraiser starts. But most importantly, they are showing us which messages will best motivate donors this year.¶ You can see the winning banners below from our tests. The percentages indicate the share of people who clicked on each banner. (In each test, equal number of people were exposed to each banner.)” - × × ×