Not saying it is a grand system but I feel like overall you would get 100 dubloons in 100 runs. Realistically you do not always get them but I have noticed at times you get several in one go.
I need people to vote on my question about Dubloons because I need the answer from Ion himself so I can stare at his smug little face and watch him try to dodge the question.
I want that awkward silence, this is your punishment, ION!