Basically, anyone who was subscribed to the recently cancelled Sonic the Hedgehog comics can get refunds from Archie. You can request the full $20 back, regardless of where you where with your subscription, or put the remainder of your subscription toward any of their current books. I also heard you can put it toward an upcoming comic book series that they're releasing, and have been hyping up for a while now, but I couldn't tell you anything about it since I put the publisher behind me years ago.
Be sure to spread the word, as I imagine a number of peeps here and on similar sites were subbed to the Archie Sonic comics. Have a good one, folks.