We are grateful to FutureLearn, the platform on which our online course MOOC English Pronunciation in a Global World runs. This is what FutureLearn says about free courses:
[O]ur free digital upgrades are online courses that have been sponsored by the course content provider, so learners, like you, can learn for free. These sponsored courses give you unlimited access to course content, meaning you can keep these courses for as long as they’re on the platform, complete tests to demonstrate your knowledge and get a digital certificate when you complete the course. Just look for the ‘Free digital upgrade’ label on the course subject pages and click on ‘Join now’ on a specific course page to start learning.