Theoretically, because his legacy gets linked to prestigious research rather than trafficking children and pedophilia. I'm not sure how you would weight that downside, but Rockerfeller isn't remembered for the Ludlow Massacre (usually).
There is nothing anonymous about this at all. Negroponte has admitted he knew about Epstein's conviction in 2012.
And I quote "We all knew he went to jail for soliciting underage prostitution,” said Negroponte. “But we thought he served his term and repented."
What a fucking joke.