I think what you find on HN is that these fit into grey areas, and basically the community decides on if they stay on the home page or not.
How I look at it is that you are never going to be reading all the articles on the front page right? So if this doesn't interest you it is as simple as skipping it. If one day there is 15+ of these type of grey area links on HN, then that will be a problem, but I just don't see that happening.