If it was one person or even a small team, considering the bounty is $27 million, it may well be totally worth it. Depending on how many people have actually earned it.
even if the bounty splits up to be enough to last them the rest of their lives they still may be excluded from the reward depending if they are running other operations that would fail if their envolvement were revealed. or maybe not, but the cia would be revealing the identities of apparently very talented agents, they might not want to let them go.
or maybe the reward given in secret, but that would be fishy in the public eye wouldn't you think?