> To me, the primary issue is that Facebook does not adequately differentiate organic content from sponsored content.

This is a classic isolated demand for rigor. “Sponsored” is exactly as prominent on Facebook as “op-ed” is on newspapers and “advertisement” is on whole sponsored segments of magazines. In all cases that word is there at the top in a normal font. What else are they supposed to do, make it flashing and rainbow colored? Why not complain about newspapers not doing that?