Discounted amount not shown for all sale items

https://www.pathofexile.com/shop/category/daily-deals/
http://imgur.com/87TIqVa

The Premium Stash Tab Bundle and Stash Tab Bundle each display the exact amount of points you will save when you click the Buy button (discount appears below the original price). None of the other items there however display this! Please update your Shop system to show the exact amount of points you will save for any item that goes on sale.

there is no discount, it's an illusion. the "discount price" is the real price because there is no pressure to purchase mtx at any given time.

discounts in the real world work in a way that you need cloths to wear and food to eat and you have to choose between differently priced goods.

things were different when you had to choose between mtx to be able to play, discounts would make sense there.

tl;dr nobody buys mtx not "on sale" so it really doesn't matter.