Does anyone know what the formulas for ducat gains are?

Question in title. I'm curious to see what the actual formula is, as I've seen very varied amounts of ducats from game to game.

[Jigoku]

Ducats gains depends on the duration of your matches, the number of matches you alreay did today, the results of the match, and some other factors.

With the next patch, Ducats gains will also be increased at higher level brackets.

Ducats gains depends on the duration of your matches, the number of matches you alreay did today

meaning you win more the more games you played or you gain less?