I think you are failing to realize how different Runescape and World Of warcraft are in terms of development , RuneScape is a fucking awfully made game that has completely ruined it's at best shoddy reputation.
I would not look at Jagex's business models as a guide on how to run a game , they have proven over years at how inept they are.
I think Andrew gower would be completely disgraced if he saw how they have ran the game into the ground.