I completely agree with you, but at the end of the day, it doesn't matter who shoulders the blame if OSS maintainers start to get wary of README/docs PRs from github users with Indian-sounding names.
It’s fairly trivial to tell a spammy PR from a legitimate one by just looking at the content of it. Even if a docs change by an Indian account who joined yesterday, if it fixes a real typo or something then it is legitimate is it not?
But are you seriously gonna blame people looking for free swag? How many of us haven’t done something for swag before?