4th bonus is 12k gold. To clarify on the milestone confusion, I think what Nate means by the milestone bonuses is that if say the milestone bonus is at (made up numbers) 50 100 500 1000 played days and you log in for your 600th played day, you won't retroactively get the 500/100/500 bonuses even though you qualified for them. After 400 more played days then you would get the 1000 played day bonus on that day. Please correct me if I've misunderstood.