I suppose it was inevitable, but, when the point is learning only, why bother?
This screenshot shows an online learner (“Customer”) in a free online course (http://www.edx.org/course/harvardx/harvardx-ph207x-health-numbers-354), purchasing answers to the final exam questions.
This prompted quite a debate in the discussion forums of the course.
What is the point in achieving a course completion certificate by cheating in this way? The certificate does not carry any credit; the only benefit of taking the course is the learning.