Have you tried to clean out a dogs ears that have not been cropped? It's very simple, and should be part of every owners doggy health routine. Cropping the ears of a dog with lovely exposed and non hairy ear canals seems a bit ridiculous does it not? There has been no evidence whatsoever to suggest that cropping ears reduces the risk of infections. Ear hygiene and health maintenance is the correct way to prevent infection.
But I see that you state it's mainly for looks. And I just can't help the surging feelings of utter disappointment in the human race when I hear things like that.
I thought your puppy was a beautiful little thing with floppy ears in the first few pictures. What a wee darling.