IMHO it's just more catchy and click-baity title, that's all (and you can down-vote me for this, but I genuinely believe author's intention was to simply catch more attention with such title). We can not start calling every electric car 'Tesla clone', every smartphone 'iPhone clone' etc. To escalate this discussion more author, in a true click-baity fashion, could have added word 'hack' somewhere in the title.
Just to rant, but lately in HN you can see rather a lot of articles, whose titles do not represent the content correctly (hopefully, like in this case, HN thread name is more correct than the article's title), which catch your eye by using some trendy trademark or word (like 'hack').
All in all, titles and use of words is a delicate discussion, which can be seen in many threads of HN.