I've done a fair bit of searching in the news posts and whatever Google can find about announcements.
Nothing concrete for when RSC became unsupported, but if we were to use updates done during work hours then RSC was unsupported shortly after 2004 when RS2 was released.
There have been comments throughout the years, which suggest that the updates done to RSC were personal projects done by Jmods.
Therefore, if RSC was unsupported at the time of Robs accusations, its not unreasonable for Jagex to do nothing about it. Furthermore, its unlikely that Jagex wouldn't have looked at legal action for on of their staff undertaking actions that Rob suggests.
Which is why its not been seen in the public domain.
19-Aug-2018 02:23:05