DU for O'Malley fund raising link at Act Blue is now in second place
Donate here:
https://secure.actblue.com/contribute/page/duforomalley
All the proceeds except the cost of processing the credit card go to his campaign. There is no option to split to any other PAC, web site, DU etc.
There is an OPTIONAL tip available for Act Blue PAC, the most successful fund raiser of the Democratic Party.
NYT: How ActBlue Became a Powerful Force in Fund-Raising:
http://www.nytimes.com/2014/10/09/upshot/how-actblue-became-a-powerful-force-in-fund-raising.html?abt=0002&abg=1
O'Malley's campaign uses Act Blue too. This just keeps a total of $ donated by DUers and friends.
All the donated $ to O'Malley goes to O'Malley except for the actual charge card fee by law:
http://support.actblue.com/faq#q15
Fees all vendors pay to use your credit card from a vendors perspective:
http://paysimple.com/credit_card_rates_explained.html
IF you give a tip it goes to Act Blue, the most successful Democratic $ raising PAC for their in house expenses like rent, payroll, IT, etc.