An explanation that would fit both the old accounts and the artificial comments would be that they were encouraged by the author to comment (which is against the HN rules).

I'm on the other side of the planet, generally not a fan of web dev, and heartily agree with the sentiments in that comment.

Those are fairly normal comments around here.

They're probably just Indians using the framework saying "thanks." India has the largest population on Earth, they're close to 1.5 billion now. I think some people underestimate what that means.

This seems like some pretty lazy analysis to be honest.

Following the first comment you quoted...

> I love it. We need to see more of this.

...shows that the author talks about using a “Chase card abroad” in a previous comment [1], which means they cannot be Indian as Chase doesn't issue cards or have substantial operations in India.

I don't want to run around following specific comment authors back through their threads, but as an Indian by birth it is pretty hurtful to see this kind of drive-by casual characterization of an population in a space like this. It also seems to be pretty contrary to the HN guidelines (“Please don't sneer, including at the rest of the community.”)

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[1] https://news.ycombinator.com/item?id=46535775