[jader201]

I bet had they left "Show HN: " off, it would've gained more traction. I have several theories behind that:

1) It looks more like a discovery.

2) It doesn't look like a self promotion.

3) The point of the article is at the beginning. I.e. a certain percentage don't read past "Show HN".

Again, just theories. No idea if this is really the case. But I don't remember many (maybe any) of the other 2048 clones making it to the first page being "Show HN" submissions.