http://www.phaxio.com http://www.phaxio.com (next time please post a clickable link) Out of curiosity: how does http://faxzero.com/ http://faxzero.com/ manage

http://www.phaxio.com http://www.phaxio.com (next time please post a clickable link) Out of curiosity: how does http://faxzero.com/ http://faxzero.com/ manage to subsidize cost of sending a free fax [one per day] via advertisements?