Hi Connor! Thanks for this question! The topics without links are still in development. Jonathan (our course instructor) earned his GCS in June of this year. We wanted to make the course available as soon as possible to aid in your study process from start to finish – even as we are putting the finishing touches on some of the material. We view the first year of the GCS Advantage as an ever-evolving course and look forward to adding more content frequently throughout the year. The GCS Advantage is priced according to the content available. As new practice exam questions and study guides are added, the price will be adjusted – but all participants will be grandfathered in to the new material.