Interesting, I never thought about it that way. My problem with selfie sticks always was that I don’t get why on earth I would have to be in every picture I take of some scenery or place. I was there even if I’m not visible in the picture, and any picture of some nice outlook can only be better without people unnecessarily clogging up space in it, but perhaps I only lack the required bragging drive and skills 
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On topic: People here suggest the SelfiShop Camera App did the trick for them, when taking pictures via audio port didn’t work out of the box.