Must actually read all the article to figure out how it is free
Requires going to a web page to get the key that makes it free. Looks like it is a 72 hour wait today, which probably means that a human will supply it on Monday.
If the article was written better, the instruction for getting to the second slide would have been on the first slide text. (You won't see the second image until you read the text below it in the article)