I'm sure that you can find people who are huge fans (addicted as a news article might call them) to any technology or gaming product. The world is huge. There are, for example, people who loved Windows Phone and Zune. But just because a product has a fanatical core doesn't mean it'll eventually take off - or even maintain viability.

Most of the draw was that you could design your own avatar. There were a lot of furries.

>I remember watching a documentary a while back saying some people were totally addicted to it

not necessarily a good thing

Second Life is still active almost 20 years later, I don't know why people keep using the past tense.