Why would we want an addictive game? I just want a fun one *shrug*
IMHO, any players who use MMO as a social network and are willing to pay a monthly fee are in WoW, end of story.
If Tabula Rasa had managed to find a pay scheme that is a one time cost for me, the player, I might actually be interested. I know I can't speak for anyone else but if I either find out that something is using "rental" DRM or requires a monthly fee, I pretty much instantly ignore it - I just don't have the budget or desire to spend my spare time on that kind of gaming culture. If I want that experience, I'll go play a graphical MU for free.