NYT covers article-writing as a profession. It pays. Though not as much as a good software writer, but not much less either. The news covers article writers mostly from Kenya. The lady being discussed earns $300/month. While the best writers earn $2000/month. I guess a median value would have been a better indicator than these max values, as most of the people can't reach the max.
There's question of legality. But it's unethical for the one who's buying it from me. Me selling my service shouldn't be unethical, at least that's my justification anyway :-)
There are many types of article writing. This one covers writing homework and solving assignments for USA kids. :-)