Really great idea for this kind of game.
RuneScape is based entirly on the internet using Java, it's graphics aren't first class but to look how big the RS world is, how many people play it, lots of skills, quests, this is one of the best Multiplayer games I have ever played!
If you don't want to pay then you don't have to, sure you won't get all of the features that members have but all you have to do is to wait for a loading screen that will only take along time the first time or when an update is installed into it.
Anyone who thinks RS is stupid, fine. It's your opinion, but do stop and think for a second, this is one of the biggest games on the internet, think of Jagex's acomplishment, don't just shun it and everyone who plays it, because when you say it's horrible or a waste of time, you are probally forgeting the millions of registered players in RS.