I'm currently taking this course for the second time. The first time I enrolled I didn't get around to watching any of the lectures. Luckily, I ran across a reminder email from the course and it just so happened that I had enough free time to re-enroll and complete the first week's lectures. It's really difficult to feel invested when the cost to sign-up is $0. They do try to create a community around the course, but it's so distributed that I wouldn't consider it a cohort in the traditional sense.