The free gift with Clinique ended in October. Like I said, the next one isn't til March (at least with Macys)
What you have to remember is there's different promotions at pretty much any counter at any given time. There's PWP which is Purchase with Purchase, which is what the PP is referencing with Estee Lauder, there's also one in Lancome at the moment. A purchase with purchase is just that really. You make a purchase, sometimes a specific item or category of item such as an Estee Lauder fragrance and that then qualifies you to purchase an additional item at an added expense which isn't available to anyone who hasn't bought the...we'll call it a qualifier.
A GWP, gift with purchase, is a free item (sometimes a singular item, sometimes a set) that is gifted to you for making a purchase at a brand. Again, this may have restrictions to it as well. You might have to buy from a certain category of product (ie skin care, foundation) or you might have to meet a minimum total to qualify. The last Clinique gift, you had to buy approx $25 worth of product to receive the gift.