[fxtentacle]

It's the users. And money.

JavaScript is super popular and used by companies so there are lots of people releasing their own open source project in an attempt to hustle into a well-paid job by looking more experienced than they really are.

I'd say it's the same reason why there are so many bad Java and Php tutorials.

C++ for comparison is shielded from this because it's not the kind of programming language that you would learn in a weekend seminar to improve your salary.