Well, I hated RuneScape. It's big selling point is that it doesn't install anything on your computer: it is entirely Web-based. Other games install a program, usually two to four GB in size, on your machine and you use that to access game servers. RuneScape serves people who are perhaps justifiably paranoid about hackers, phishing, and viruses gaining access to their computers.
What do you get in return? The RuneScape experience is summed up in one word: inadequate. Terrible graphics, terrible writing, and godawful annoying music throughout. The technical prowess displayed in this game is only marginally better than that of the SNES, back in the day, and comparatively falls short on many other levels.
Nowhere else do you get what you pay for more directly, more truly than with RuneScape.