It does https://immich.app/blog/immich-product-keys

But as far as I understand the key doesn’t really go anywhere, it’s just a fancy way to suggest a donation. (And there’s nothing unethical about using FOSS without paying or contributing back in any way)

Last year China installed more solar than the rest of the world combined, but they have less than 1/5th of the worldpopulation 🤷

There are lot’s of things you can criticize China about, their commitment to renewable energy isn’t one of them.