Nevermind! Looks like he just got the key, just took humble bundle about 70 hours to send it. Too bad that we didn't have it for the weekend. Makes it harder to suggest buying it from the site. Factorio themselves are so quick with everything, it's just unfortunate they partnered with a company that ...

I think you're mistaken. Humble bundle provides the widget for the payment. But that's all if you buy it on factorio website. At least that's my understanding.
So if your friend logs in on factorio.com, he should see he owns the game and should be able to download it.

Anyhow, he can write at the ...

My friend (from my suggestion) purchased this game directly from the website. Little did he know, and I checked to verify, when you buy from the website, it's buying from Humble Bundle. It seems odd of Factorio Devs to do this; Humble Bundle is the exact opposite of Factorio. They don't care about ...