Yes, I definitely have! I almost always received a generic form letter about how they appreciate my feedback but not much else.
I don’t really give it to the brand directly, since my feedback is usually through the form of reviews posted here!
I’ll avoid wearing makeup if I can, but if I need to have something on when I land (e.g. not much time to apply anything), then I’ll go for a tinted moisturizer, cream blush, and a little mascara/cream eyeshadow. I’ll apply lipstick and/or lipgloss after I arrive since that is very quick!
For me, it’s usually what do I need to test and when, so anything that is higher priority will get used right away. I keep everything that is ready to be tested in one bin, so it’s easy to find everything, but I usually have a good idea of what needs to be tested next.