Knowadays only guarantees you work with their partner agency, Proofed, if you pass the Becoming a Proofreader course with 80% or higher (i.e. a distinction). The Becoming an Editor course doesn't come with the same guarantee by itself. However, on the Guaranteed Work page of Knowadays' website, the company says that earning a distinction in Becoming a Proofreader and passing Becoming an Editor "expands your opportunities with Proofed." In practice, this means that you will have access to a broader range of work assignments and will be paid more for working on certain documents.