https://phys.org/news/2018-07-twitter-curbs-access-apps-crackdown.html

"We're committed to providing access to our platform to developers whose products and services make Twitter a better place," said Twitter senior product management director Rob Johnson.

"However, recognizing the challenges facing Twitter and the public—from spam and malicious automation to surveillance and invasions of privacy—we're taking additional steps to ensure that our developer platform works in service of the overall health of conversation on Twitter."