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But Bully Pulpit Interactive, a firm founded by staffers of Mr. Obama’s 2008 campaign, purchased $79 million in online ads for the president this cycle, also taking a commission. Its founder, Andrew Bleeker, earned only $16,000 in 2008 as a staffer for the campaign, and has since springboarded his success into a profitable business for a variety of clients.

Fundraising commissions on big-dollar checks also were paid to a Romney associate by the Romney super PAC, Restore Our Future, which raised $130 million. Podium Capital, a firm established in April 2011 by Steve Roche while he was the Romney campaign’s finance director, was paid $5.2 million for services, including $1 million described as commissions.

Treasurer Charlie Spies said he was proud of the committee’s fundraising overhead rate of 5 percent.

Priorities USA, the pro-Obama super PAC, had a similar rate, raising $64 million and paying $500,000 for fundraising consulting plus $2.4 million in payroll.