Humble Bundle question

Generally, when the Humble Indie Bundle adds a bonus game, they give it to everyone who paid any amount previously (though only steam keys if you paid at least a dollar), even if the new addition is beat-the-average for latecomers.

There should be an option on the key page saying "Link this to my account", or something like that. Once you link it to your account, you should be able to pay more.

It's not evil, because paying 1 cent won't get you steam keys, which in this case it's the only thing provided. So paying less than a dollar or 1 cent would actually mean you're donating without asking for a game :D

Edit: My mistake, you'd be paying for the soundtrack :3

He can purchase it as a "gift" and send it to your e-mail address. Whoever has the URL will have access to the keys and as such, the second week bonuses.

Once the second week bonus is added, the key will need to be retrieved from the URL, they aren't automatically added to your Steam account.