Free speech in the era of social media and "cheap speech"

https://www.nytimes.com/2017/10/27/opinion/twitter-first-amendment.html?&moduleDetail=section-news-1&action=click&contentCollection=Opinion&region=Footer&module=MoreInSection&version=WhatsNext&contentID=WhatsNext&pgtype=article

"At a minimum, new rules should bar social media companies from accepting money for political advertising by foreign governments or their agents."