I would be really surprised if this was a scam. It doesn't have the smell of a scam at all. Who would target a very tech savvy audience just to get old laptops?
Given that the "sign up" link goes to a survey form, my guess is this is just some idea someone had and they made this page to see if anyone actually wants it before they put any effort into making it happen.
Colo scams are pretty common. Some percentage of people will offer to send expensive laptops, and the scammers can discard the rest of "interested customers".
It is inviable to colo old laptops, a regulatory nightmare - Hetzner would NEVER accept those in their datacenters. It is also absurd to think they are partnering with Hetzner to begin with.
It makes no sense to believe they will even EXPORT laptops from Europe to the US if you choose the US location. It just makes no sense, so I don't get why I am getting downvoted.
Given that the "sign up" link goes to a survey form, my guess is this is just some idea someone had and they made this page to see if anyone actually wants it before they put any effort into making it happen.