river mines
In the case of G4, it was originally supposed to last 3 seasons, but the success meant that it was extended to 9 seasons, that’s the triple.
and yet, the last episode of the third season, like it or not, functions as the series finale.
So If the writers did SoS the way they did, aware that it was possible MYM wouldn’t continue beyond the episodes that were ordered, was their mistake.