I'm a former journalist who used to work for a metro daily newspaper that has long suffered, as most newspapers have, from declining ad revenue.
For these papers, the only reason to partner with Facebook is because they feel they have little choice. They would much rather have a healthy revenue stream and be self-sufficient.
But so far, the news industry has not found anything that adequately replaces the print-ad-driven business model that served it so well for so long.
So they're willing to try just about anything -- including, apparently, accepting a dinner invitation from a reputed cannibal.