This userscript automates the redirection of Medium articles to freedium.cfd, a site that allows you to read Medium Premium articles for free! The reason you cannot use a simple redirection pattern is due to the following reasons:
Medium is an SPA; therefore browsing articles and clicking on one wouldn't rerun the script
Some Medium articles are on nested subdomains, not on the domain medium.com
This userscript solves those issues. It runs on the first navigation of a two nested subdomain site & checks if it's a Medium article using some meta tag properties. It exits if we're not. It also checks whether we're on an article on medium.com.