Maybe this is too small of a niche to actually be implemented, but I would love the option to add free products if certain price ranges are met. While not many businesses do this, generally when someone spends $25 I will through in a free small item to their order, and if it was $35 two, etc. Having to do that at random is fine, but I know a lot of customers would love the option to pick what they are receiving for free.
