Trent has released Nine Inch Nails’s latest album online for free download – all you have to do is submit your email address and you’re emailed a download link to grab the album in a choice of audio formats. For free.
As said on MeFi, this is about generating leads for the tour:
Acts with staying power (Rolling Stones, Grateful Dead, Pearl Jam, Radiohead, etc) long ago realized that the real money is in the tour, and in owning as much of the tour as possible. The "album" is a promo for the tour, like a leaflet or something.
He is using a free download as a tease to build his email list. Like a little pink spoon of deliciously nihilist ice cream.
Except swap out spice and make it email list.