Shitoberfest (twitter.com)

You get a free t-shirt if you submit 4 PRs. An Indian YouTube channels with 650k subscribers made a guide and 10,000s of people are following it.

> Surely hundreds of people aren't all submitting nearly identical PRs?

You'd think so, but in much the same way as a hundred (okay, million) students can all write "Hello world", yes, it does appear that at least part of this is actually humans, albeit (as sibling comment notes) following the same instructions.