Just because the developers are shifting their attention to another game, doesn't mean it's the "end" of WLO. Sure, it may be the end of new updates, but does that mean people will suddenly quit and WLO suddenly becomes a ghost town where not even botters will bother?

Sure if news got out that there really won't be anymore updates, those big spenders will probably think to themselves "should I continue to invest time and money on this game?" but there will still be mallers nonetheless.

However, you can tell when WLO is about to end when these signs appear:

1: massive amounts of IMP offers for the best items in the game. And I mean massive. Like a final attack before you die, trying to get as much as you can.
2: more focus on new games that are being brought in
3: cutting services for the game, like LS