I just copied this from the LDS website, familysearch.org. As you can see Ancestry just paid for LDS records. You can see them free at a FHC plus much more.

"The 1880 U.S. Census Index is now linked with digital images of the original census documents; made possible through an agreement between MyFamily.com, Inc. and The Church of Jesus Christ of Latter-day Saints. The 1880 U.S. Census index and images can be accessed at both www.ancestry.com and www.familysearch.org.
Agreement Benefits to Users:

The 1880 U.S. Census index can be searched for free at both www.ancestry.com and www.familysearch.org.
The digital images of the original census documents are available at Ancestry.com and can now also be accessed from Familysearch.org.
Patrons of the Family History Library in Salt Lake City, Utah, and any of the 4000+ family history centers worldwide can view the images at no charge.
Church members who sign on or register as members through Familysearch.org can also view the images at no charge. Other users through familysearch.org can view the images for $9.95, which will give them access for 30 days.
(updated: July 31, 2003) "