This doesn't look fake to me, and I have several facts to support that conclusion.
It seems that the user "papka" is either trying to mislead people, or they simply have a different set of server files with a different directory structure, different file names, or files from another publisher. However, even that explanation doesn't make much sense. Regardless of the publisher, the actual developer was NHN Corporation. They licensed and distributed their work to different publishers, so the core codebase should be essentially the same across all versions, with only minor, publisher-specific modifications.
As for the evidence, both Continent of the Ninth Seal (C9) and R2 Online: Reign of Revolution were developed by the same company, NHN (Hangame). I have the original R2 Online server files, and after comparing them in detail, I found that more than half of the files match.
The similarities go far beyond file names. Many files have identical sizes, including libraries, resources, utilities, scripts, and other components. Some files even have identical hashes, which strongly suggests that R2 and C9 share the same underlying codebase, with only game-specific modifications built on top of it.