The minimum spend requirement now has a different interpretation depending on other discount settings.
If you want free shipping if spending over $100, then this $100 spend is based on all the products purchased (pre discount)
If you have specified relevant conditions of products/categories that must be purchased, and a minimum quantity and spend required, then the minimum spend will focus only on products matching those conditions.
If the discounted items have the same conditions as the reference items, such as in buy 2 get 1 free deals, then the minimum spend will include the total pre discount value of the all the items including any free items.
Example
If buy 2 get 1 free oranges, with a minimum spend of $10, and the oranges are $1 each... Then you will get the free oranges as soon as you put $10 worth of oranges in your cart, but not before. The logic will ignore if you have kiwifruit in your cart.