Soul Man, a Supernatural Fanfic

Demon Dean Winchester's crowdfunding project has a bit of a twist
from all the others: "...this one won't cost you a thing. Not one thin
dime. All you have to do is hit the button on the next screen and pledge
your soul to me...I guarantee that the next twelve months will be the
best damn year of your life. You can party non-stop if you wanna. It's all you."