You would that its the https protocal since this college requires students to sign up. But make no mistake. This is an open college, a union of currently 33 universities from all over the world. You need to sign up and enrol in the course you want to take, so that your instructor(s) can track your progress, as if you are admitted in a real world college. Your commitment is exclusively to yourself. You need to keep track of your own progress so that you really achieve the goal of the course as set by its instructor.
Hey I see one of the member university is from my country, the Hong Kong University of Science and Technology. I studied there, quite an unfriendly campus I regret to say, students and faculty members are very competitive and therefore sometimes can be very hostile to the others, typical Hong Kongers they are, but it is undeniably is a prestigious college especially in science and technology.