The call to action [CTA] feature had been popular with broadcasters, who used it as a way to steer users to their own sites.
The change in policy was made earlier this month without warning.
Experts say the decision is another illustration of the power that Facebook now has over how the public reads and watches the news.
According to a recent study
, 28% of people in the UK use Facebook as a news source at least once a week, with that figure rising to 41% for the under-35s.
Full article from the BBC: http://www.bbc.co.uk/news/technology-36586021