Other instant yields don't benefit from % increases, right? So I don't think border growth should either. I'd be more in favor of inverting (and partially reverting) the logic of the initial proposal, so that the reductions are applied to border growth cost once again, but using a multiplicative formula rather than additive. The numbers would be the same, but you'd have the mechanic work consistently with other cost reductions (like India), instead of being an exception for instant yields. Although I say this, and then I'm trying to remember if India, Byzantium, and Fealty's cost reductions all work the same... they probably should.