According to the Chronicle of Philanthropy, online giving is growing at a blistering pace. Two studies cited by the Chronicle indicate that online donations to 115,000 nonprofits rose by 14 percent to $2.1-billion, just between 2011 and 2012; and that online contributions to the largest 149 charities in the US also grew 14 percent, to $785-million.

http://nonprofit.about.com/b/2013/06/25/online-giving-grows-as-charities-polish-their-methods.htm