Krakatoa C4D is now available free of charge (as is the case with all of our plugins and Deadline). More information can be found here: AWS Thinkbox products now available free of charge | AWS Media Blog. The new versions can be downloaded from https://console.aws.amazon.com/nimblestudio/home#/thinkbox with a free AWS account.
This version supports Cinema 4D R23 to S26.