Sorry, but using your points to get them is not "getting them free".
That's like saying you also got them for free if you used a gift card or if you found a $10 bill laying on the floor.
It still cost $10.
Except that points have less value than cash or gift cards. Points expire. There are basically three ways to go: 1) they expire and you got nothing for them, 2) you spend them on something you don't need anyway, or 3) you use them on something useful AND on sale.
Due to the fact they aren't real money and expire, I consider them to be more of a coupon.