If you ever find out, I'd love to know! I was happy about my sample, but I think I got a few larger samples in the same box. Birchbox has so many teeny samples! I bet there's several box combos every month that just LOOK sad, even if you like the products.
Definitely! It's fun, but I try to act as though my default state is unsubscribed. If I resubscribe with a $5 off or 50 point code, I end up breaking even when I redeem points from the shop. Assuming my shop purchase is something that I'd be buying anyway, the things I got in my box end up being a fun GWP. But if I operate that way, I HAVE to think of my shop purchase as real money even though I'm using points. I also give a little side eye to people who act like points purchases are totally free.
If they have a 100 point code though, I actually come out ahead. Er, I'm not making money, but I am getting a nice discount on things I'd be buying anyway. Algebra in real life!