I suspect that it will more likely be similar to YouTube where they try to keep images and other IP up, and generate ad revenue for both FB and the creators. Most of the team behind Source3 worked on a startup called Rightsflow, which did music licensing and eventually was acquired by YouTube. They were responsible for doing a lot (all?) of the music licensing for videos, so that instead of videos being taken down they could instead stay up and have rev-share for everyone.