Another feature request similar to this exists for Discounts, but not specifically for Pass Rules.

Can we please add a Buy One get One free, or Buy One get One for % off Result for Pass Rules. Currently the only possible Results are a flat % off or $ off, but a quantity based % off would be awesome.

Not sure if a quantity based $ off would be desirable... ie. buy 3 get $10 off... or is that just being silly for the sake of parity.