Hey, would love a steam key / reload of keys! But yeah, i get that you want to make sure, about the circumstances / what has to be done etc.
I also had one game steam key purchase in a bundle, where a game-dev (AIdol: Artificial Intelligence Idol) refused to restock the steam keys, because he said he was included on his own will / behalf, but he said, he didn't realize how many purchases and steam key requests there will be, so he got overwhelmed and couldn't supply it. And though it's a bit shitty, because purchase is purchase / breech of contract - i still get these problems for devs, as far as i know, it's now more reglemented, how many steam keys you can supply apart from the steam store?