u were lucky that u didn't submit it..
I applied for internship of "content writer" and they asked me to write article. (they said they want to check writing skills).
I send them that article and after 2 days they posted on the site that I posted in my 1st post.
Every time there is some positions available at meritocracy (but in reality there is no position available). They just waste time and effort of others and they ask candidates to submit sample work and they give tasks to candidates and get their work done at free of cost.