It's creative, I'll give you that but c'mon guys. These people are already playing Runescape, anything beyond that is just cruel and unusual punishment.
You must be 12 and like new to the internet. As crappy as most MMO players think it is, it's actually very successful and populated than most recent over-rated MMOs.
Not to mention that it's free and plays from your browser so that gives it really easy access to anyone who wants to try it. I find it really hard to believe you've never heard of it. It may not be the MOST popular online mmo, but it's definitely WAY up there. I actually played it a lot when I was younger. It's incredibly deep with nearly unlimited things to do.
Never heard of it.