I'd be curious how many OSRS players had never played RuneScape prior to trying OSRS; definitely a few due to OSRS Gold the simple fact that it's become a bit of a cultural phenomenon/icon but it can't be many. I imagine interest in a 13 year really grind-heavy, mostly obsolete old MMORPG running on a 20 year old spaghetti powered engine isn't very high among younger viewers that didn't grow up...