At some point, a company's organic reach on Facebook may hit zero

[youtube http://www.youtube.com/watch?v=3fKix0z2lrY&w=600&h=315]

Back in March 2012, Facebook told brand managers that the organic reach of one of their posts would be about 16 percent of their total audience; if they paid for a post, that could get up to 75 percent. In reality, around October 2013 the organic reach was 12 percent or so; around February …