I meant to say, are there people who have never heard of SL that use plurk?

yes

15 year old Malaysian boys seem to like plurk.

I seriously don't understand why plurk isn't more popular, I think it's much easier to follow than Twitter.

And if a few RL celebrities get on board I think more people would follow.

I have all these fans with empty timelines. What's going on there?

I don't know. I got 3 fans or so when I first started who I didn't recognize and didn't have friends I knew so I deleted them