Lots of folks messaging me to say low completion rates are the norm for online courses...

but also for:

best sellers: #gallery" rel="noopener noreferrer">http://www.independent.co.uk/arts-entertainment/books/news/the-books-many-start-but-few-finish-top-unread-bestsellers-revealed-9590910.html#gallery

and video games:
http://www.ign.com/articles/2014/03/17/gdc-most-players-dont-finish-games

Completion isn't the best metric.

But how do you get the outcome if you don't do the work?