Zoya's Earth Day promo has worked the same for years, I think, right? You order a minimum of six polishes (and there's a maximum, too, which I've never come near so I don't remember what it is) and you get them for half-price with free shipping. Plus you are supposed to either return an equal number of bottles of other brands of polish to Zoya for recycling, or responsibly recycle them yourself - but they don't police that part. (I've typically just recycled for myself, since I found out early on that if I try to remember to send polishes to Zoya, I just forget.)
So I ordered six polishes, and I got seven (I'll explain that below). This is the first three, Leisel, Aggie, and Finley:
And then I ordered the three Kisses jellies (R-L below, Princess, Libby, and Vickie) and found that when you ordered those three, you got a free fourth, which is Leia, the white one on the right. (I guess that was another promo that was ongoing at the time, because I don't see it when I look now.)
Then when I opened the box, there was another freebie, which was a little Naked Manicure hand-care set. I thought I had taken a picture of the box, which I believe said Hydrate and Heal, but I can't find it.