How do you feel about free gifts included with purchases?

I bought something on Poshmark recently and the seller included a free gift... it was a new bottle of a popular type of probiotic gummies. I take probiotics daily and I just know that that bottle had to be worth more than the thing I actually purchased. I'm not mad about it, because it's something I'll actually use. But what if I had no interest in probiotics? I'd probably throw it out, which would be a waste.

Buyers, do you like getting free gifts? Why or why not?

If you're a seller who includes free gifts, what's your reasoning?