Bonus cash is not a constant. It depends on the machine being played,
and the casino's assignment of a "theo" (their theoretical win, the
player's theoretical loss) to that particular machine. I believe I was
told previously that bonus cash is 10% of theo.
In the case of the new 3/5/10 play machines, they offer four games, as
opposed to the six that were available on the previous 3/5 play
machines.
Considering that the two games that are no longer offered are short pay
versions of triple double bonus poker and joker poker, it is hardly
surprising that the casino has revised their theo downwards, and that
bonus cash on the 3/5/10 play machines is approximately 10% less than
what it was on the 3/5 play ones.
Neil