Maybe there isn't a limit of three random events?

[B0rsuk]

I think it's more likely that Turmoil increases the cap of random events. They may have changed it to make Turmoil/Luck combo somewhat similar to Order/Misfortune. I wouldn't be suprised if no one discovered it before in Dominions3, because it seems that Turmoil is one of least popular scales. You may not need resources, but you always need gold for troops, commanders, buildings, PD.