An article with some statistics on MOOCs – http://www.goodcall.com/news/moocs-at-the-four-year-mark-04160
«17 million students signed up for a MOOC class in 2014. In 2015, that number climbed to 35 million. Total student users from 2011-13 combined are less than just last year’s tally. 2015 students could choose from 4,200 courses from more than 550 different schools. While some courses are available in 16 languages, 75% of MOOCs are in English.
Big-name U.S. private universities offer MOOCs but they aren’t the classes that get the highest reviews. Six of the top ten colleges offering at least 5 classes in America are Santa Fe Institute, Case Western Reserve, San Jose State, Yale, University of North Carolina at Chapel Hill, and Wharton School.»