Seriously??? That's very surprising that someone who reads hn hasn't heard of something as popular as instagram. It was a big deal on hn when fb bought them. even a quick search on hn shows over four thousand results. I don't buy it unless you're new to hn or the internet.

I've only been reading HN constantly in the last two months and some sub reddits like /r/linux /r/programming and /r/cpp.

To me HN is just a ripoff of Reddit.

The person you are replying to has 12 karma. They may very well be a rare browser of HN and tech-sites in general.