The way the article talks about it, it is literally just app pinning. They also suggest only allowing guests to see select photos in your gallery when handing your phone which seems like more effort than its worth. Maybe just show your photos to people you trust?

Is DuckDuckGo going down the DBrand/Wendy’s model of irreverent, self aware marketing? I’m pretty tired of it being honest. Also, are they actually trying to make money from this? A satirical social media post would get the point across. But they’re actually selling these for some reason.