Well, it hasn't died yet, so I have a hard time believing it ever will.
Mainly because all of the new players who are eager to learn how to play, as most are.
If toribash had an expiration date, it would be like a twinky
( before they were all eaten of course. ) My point being, it's gonna be a while.
On the greenlight thing, that has to be bringing in a ton more players, which is good for obvious reasons.