"Kerr traces his departure to a disagreement over a possible windfall for the Puerto Rico observatory. In late July, he publicly criticized the NSF for planning to cut its contribution to Arecibo if the facility began taking payments for helping in a private survey for signs of extraterrestrial intelligence. NSF officials say that his assertions were inaccurate and that its communication with Kerr never lapsed. Whatever the facts, some Arecibo observers see Kerr's exit as an ill-timed loss for a storied, but financially threatened, scientific facility that faces a murky future.
... In Kerr's telling, NSF officials told him that if Arecibo got funding from Breakthrough, its own funding would fall by the same amount. In a 29 July article, an angry Kerr told Scientific American that the NSF had placed Arecibo in an "unscrupulous" bind: walk away from the Breakthrough money or accept it and lose NSF dollars."