They're trying something. If you don't like it, give constructive criticism, but this hostility is unhelpful and unwelcome.
>Why is it a Samsung device?
I worked on a startup which was a video chat project similar to this with a different target. We also used an existing hardware device. Why? Because tech support is hard, and tech supporting hundreds of different combinations of people's hardware is a project itself. We bought tablets, loaded our app onto them, and that was our hardware device. Yeah, we wanted to make our own device eventually, but we weren't at the point of sending a team to China to do it yet, and that's what it would have taken.
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Stop this. This is not HN's culture. If you want to offer constructive criticism, then fine. If you want to be a jerk to somebody about their product then go somewhere else. If you are thinking you want to make an alt account to be a jerk to somebody about their product, then go somewhere else even faster.