BOGOS: Free Gift Bundle Upsell

Very good app for free gifts, but too expensive for using it just for this action. I was hoping the app would let me run a 3 for 2 (buy 2, get 1 free) on selected collections, letting the customer pick the 3 items and then adjusting the cart total for the cheapest item to be free. The app works very well, but it would be nice to add more functions to justify its high price.