I came across Alison'c certified courses and was very impressed with the content as I sampled a couple courses for a test run. the Diploma of Sustainable Development and Diploma of Systems Engineering.
The founder says to have his course certified by a third party will cost students money. He was recently in Australia and I quote a part of the article from his speech.
"Last week, Feerick asked an ADC Forum of education executives and entrepreneurs what they would trust more when picking a hotel: being a member of the local hoteliers federation or having high scores on TripAdvisor? The room went for TripAdvisor and Feerick had his gotcha! moment. If credibility is based on market feedback, then formal accreditation could face a challenge.
I personally think its not an equitable comparison of tripadvisor ( by the way I use trip advisor a lot) and a formally recognized certified education. I think third party certification as well as the location of the institution is important and establishes a level of quality at the same time I think courses like Alison are valuable but they are still a long way off being a viable alternative for employers.