actually, if you win a bonus train competition and you already have the involved train, you just get money.
My suggestion is this :
- if you don't have a bonus train of a previous age, you will get this train instead of money
- if you already have all the bonus trains, then you will get money, as today
Example : we are in age 5 and the competition is for a train of age 4.
If you have already the age 4 train but you haven't bonus train of age 2, you will get this.
If you miss age 3 and 2, you will get age 3 train.
Same rule both for passengers then goods trains.
This is my proposal !!!