"When Twitter announced on 2 February that the social media platform would end free access to its application programming interface (API) in a week, meaning tomorrow, a clock began ticking for Jean-Philippe Cointet. Like other researchers interested in topics such as political polarization or how misinformation spreads, the social scientist at Sciences Po uses the API to freely gather data on the hundreds of millions of tweets sent daily."

https://www.science.org/content/article/twitters-plan-cut-free-data-access-evokes-fair-amount-panic-among-scientists#.Y-jIIy7Sqvk.twitter