Congressional Budget Office Cost Estimate: S. 2517: Combat Terrorist Use of Social Media Act of 2016 [open pdf - 97KB]
"S. 2517 would require the President, within 90 days of the bill's enactment, to submit to the Congress a report on terrorists' use of social media and an overview of current efforts to counter those activities. Within 180 days of the bill's enactment, the President would be required to submit to the Congress a comprehensive strategy to counter terrorists' use of social media and an evaluation of current efforts to combat such use of social media. Based on the cost of similar activities, CBO [Congressional Budget Office] estimates that implementing the bill would cost less than $500,000 over the 2017-2021 period; such spending would be subject to the availability of appropriated amounts."
Congressional Budget Office: http://www.cbo.gov/