Before Medium rolled out the partner program, you could pretty much read whatever you wanted. Medium had a ton of great content. Unfortunately, with the beginning of the partner program, about 50% of the site's best content was pay-locked, making it difficult to find good free pieces to read. The tiny star icons were difficult to notice and meant that you spent more time clicking away from paid stories than actually reading free ones.
This extension changes that. It doesn't grant you access to paid stories, but it does remove them from the homepage, like AdBlock. This makes your Medium browsing experience much better if you don't want to pay for a premium account, and it allows you to get back the old Medium that we all loved.