It seems Coursera is running an A/B test where they have removed the option to enroll for free to courses (like mine https://www.coursera.org/learn/statistical-inferences). My courses should be (and remain) available for free. Contact Coursera support if the option is unavailable for you. HT Rebecca Willén.
Improving your statistical inferences

Offered by Eindhoven University of Technology. This course aims to help you to draw better statistical inferences from empirical research. ... Enroll for free.

Coursera

@lakens Hard not to have a kneejerk reaction to even a mention of such a move.
Almost tempted to joke about Coursera pulling a CourseHero.

Glad you're searching for options. Hoping others will do the same.