The small-dollar fundraising juggernaut that has kept Bernie Sanders’s insurgent White House bid afloat far longer than anticipated has generated another unexpected impact: a financial windfall for his team of Washington consultants.

By the end of March, the self-described democratic socialist senator from Vermont had spent nearly $166 million on his campaign — more than any other 2016 presidential contender, including rival Hillary Clinton. More than $91 million went to a small group of admakers and media buyers who produced a swarm of commercials and placed them on television, radio and online, according to a Washington Post analysis of Federal Election Commission reports.

While the vast majority of that money was passed along to television stations and websites to pay for the advertising, millions in fees were kept by the companies, The Post calculated. While it is impossible to determine precisely how much the top consultants have earned, FEC filings indicate the top three media firms have reaped payments of seven figures.

Sanders’s money blitz, fueled by a $27 average donation that he repeatedly touts, has improbably made the anti-billionaire populist the biggest spender so far in the election cycle. The campaign’s wealth has been a surprising boon for vendors across the county who signed on to his long-shot bid.