I find this kind of odd. Coming from a privacy first. I dunno what to think. but whatever it is, its probably a good move.
Just not a reason i can think of right now..
DuckDuckGo is designed to protect our privacy *more*.... That wouldn't mean it would 100%, but I would trust it more than Google. But Apple purchasing it,,, Not in your life, i can't imagine a world where Apple is no longer 'Apple.'