I can´t confirm my theory either, don´t keep any log of rewards and I don´t even think the number of my own tickets would make big enough sample. But it feels more natural that the game doesn´t really recalculates the % chance, but just gives money instead.
This would mean getting more money from tickets.
But it does not happen to me!
Probably I'm very lucky
Because I do not have this observation.
32 tickets at era change - 1* gold, 1* free upgrade, 1* 20% building upgrade, 1* coin, 2* free wagons, the other 26 were $$
At the beginning of the 3rd era.
Total: ~ 150 tickets
2x Bonus Trains (~100 tickets)
4x Free Bonus Train upgrades (1 after the trains ^)
I'm not sure.
But now it's probably harder to win a bonus train without buying tickets.
I'm not sure.
But I think it was easier to get a bonus train from the daily free ticket.
The probability was much higher than 1%! Perhaps 5-10%?
I suppose it is now 1%.
There are 2 possibilities:
1. you win a bonusengine;
2. you don't win a bonusengine.
With a little bit of algebra I would say your chance to win a bonusengine is 50%
I feel like the earlier era bonustrains are easier to get, like era 1 happens quite freaquently, era 2 as well,
the era 6 one is usually quite hard to get, hundreds of tickets every time and the end-game cargo engine, i've only had 1 time ever.
Just so everyone knows, there have been no changes to how often bonus engines can be won.
think its all down to luck.
Last round i got all but the red kite bonus engines from the lottery.
on one server I currently have 4 bonus trains - and on the other servers I have none - most rounds I go through without any and some you do its just pot luck sadly