The players in the industry that went after enterprises are doing well, the players that stuck to selling mostly to individual customers are having a rough go of it. Udacity definitely had some big enterprise deals with their specific nanodegrees, but it never looked like they became an enterprise sales company from the outside.
I believe most marketing departments (along with people trying to make a name for themselves) have massively cranked up the amount of free content they pump out in the last few years. It is making it terribly difficult to become big in the education space while selling to the masses.
Enterprises, on the other hand, _really_ want to lower their salary expenditures through training and will happily throw money at a company like Pluralsight to train up new employees. For what its worth, I think they're correct that training can drive down payroll costs. But the company I worked for was acquired by Pluralsight, so there's some bias.