The Guardian has used voluntary reader contributions as a bulwark of its unique model that blends philanthropy, advertising and voluntary contributions. In the U.S., The Guardian now generates 57%, or $33 million, of its revenue from voluntary contributions, either one-off or recurring. 
On this week’s episode of The Rebooting Show, I spoke with Steve Sachs, The Guardian’s U.S. managing director and veteran of non-profit news models, about this approach and how extensible it is for news publishers.