-25% military Maintenance expense for 10 turns. Not Stackable

It'd make it more viable to play a big country, if a player chooses to do so. Also would be very helpful for indys who deal with escalating expenses by the turn.

Is 25% of military maintenance ever > 10% of production?

You might as well make this infinitely stackable but multiplicative (the bonus would be worth more if NOT stacked e.g. 0.75*0.75 = 0.56)

For big countries it might be... Maybe make it 2x stackable?