Many conservationists say that killing an animal to save it isn't so "awesome" - and that it can have negative repercussions in the long term.
"By hunting these animals, we're merely shifting its economic value to sport hunting," Jeff Flocken, who's working to save the black rhino with the International Fund for Animal Welfare, told The Dodo last November when the hunters' names were both released. "We go from valuing a rhino for its horn to valuing a dead rhino on wall."
Knowlton told CNN that the rhino is, like every animal, going to "die one way or another," whether it be from hunting or poaching or natural death, and that his hunt will funnel money into conserving the species. But Flocken argued that the animal could make just as much money, alive, if he were moved to another area and used to draw in tourists and photographers.