I collect miniature anvils.
I know, its weird, what can I say.
On two different occasions, antique dealers have GIVEN me little anvils as gifts.
Now, of course, I have previously (not on that visit, but weeks or months in the past) spent money with both dealers- but still- I have never once walked into a Home Depot or Walmart or Target or 7-11 in the USA, and had them give me a present, when I didnt buy a single thing.
In one case, I had bought ONE table from them. The other case is somebody I have bought a few things from, but over the course of two years or so, not all at once.
In neither case was I a huge client, who threw a lot of money around.
Then, of course, there are the cab drivers who constantly LOWER the price so they dont have to make change.
I have never had any merchant of any kind in the USA lower a price to avoid making change.
I have had the lower the price thing happen with others from time to time, as well- occasionally at a kiosk, or from an empanada takeout place.