My research convinced me that bounty hunters were an effective part of the American justice system so I have long favored using large bounties to find international terrorists. In 2008 the Washington Post argued that Bounties were a Bust in Hunt for Al-Qaeda:
So far, however, Rewards for Justice has failed to put a dent in al-Qaeda’s central command. Offers of $25 million each for al-Qaeda founders Osama bin Laden and Ayman al-Zawahiri have attracted hundreds of anonymous calls but no reliable leads, officials familiar with the program say. For a time, the program was generating so little useful information that in Pakistan, where most al-Qaeda chiefs are believed to be hiding, it was largely abandoned.
“It’s certainly been ineffective,” said Robert L. Grenier, a former CIA station chief in Pakistan and former director of the agency’s counterterrorism center. “It hasn’t produced results, and it hasn’t particularly produced leads.”
…the CIA did not learn of bin Laden’s whereabouts by tracking his couriers, as the White House has claimed since May 2011, but from a former senior Pakistani intelligence officer who betrayed the secret in return for much of the $25 million reward offered by the US…
I can’t evaluate Hersh’s larger claims but I find this part of the story plausible.
Addendum: The time I went bounty hunting in Baltimore.