I'll bet that if I saved the Mona Lisa, I'd get enough publicity that I could save hundreds of kittens by saying "If you'd like to thank me, please donate to the Humane Society" during an interview.
personal experience with non-profit sector revealed tax-dodges for high-net-worth individuals, and abysmally poor cash-to-cause ratios. still rescuing the kitten. bird in the hand beats two in the bush.