The list is compiled by David Venturi.
David has looked into the reviews and stars and the methods of course delivery and came up with the list.
Here is his own blog:
https://medium.freecodecamp.com/the-best-data-science-courses-on-the-internet-ranked-by-your-reviews-6dc5b910ea40
http://davidventuri.com/blog/my-data-science-masters