They way you play VV can dramatically affect how often you see Island Events. If you check a stable game only every few days, you will see events much less often. Here is why: At the same time that an event occurs, the next one is scheduled (you can see this in the game log). In my testing, after the first hour of play the events are scheduled to occur anywhere from 12-22 hours after the current event. The next event will not occur until its scheduled time (if the game is running) or the next time the game is launched after the scheduled time has passed. The problem for most people is that, if you don't check the game right when the next event is scheduled to occur, then the time between events will be even longer.
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Barbara
Unicorn
Last Day of Work