Market research concluded most passengers preferred travelling to the airport by taxi or car, and poor patronage of similar links in Sydney and Brisbane cast doubt on the viability of the project.
Shipping experts have questioned the viability of the project.
Glympse, which raised a new round of funding today, makes the same argument for its own viability as Apple casts its shadow over the market.
Further doubts were cast over the viability of Nabucco when Gazprom proposed developing a much larger pipeline called South Stream with Eni, a major Italian energy company.
As a bonus, it has also cast doubt on the whole viability of the Prime Minister's pet project, the Big Society, to which contributing and do-gooding are key.
MobShop's revamped strategy, along with Mercata's failure, casts doubt on the viability of aggregate buying as a consumer business.
Downey Jr recently hinted as much, while co-star Gwyneth Paltrow also casts doubt on the viability of a fourth Iron Man film in a new interview with Geek Nation.
Wollaston, who is admired for her independence, also cast doubt on the viability of the government's key election pledge to deliver a "truly seven-day NHS" by 2020, given the extent of NHS staff shortages and escalating financial problems.
The price of oil could more than halve again, to just $20£1313) a barrel, experts at Goldman Sachs are predicting, a shift which would spell big savings for motorists but cast doubt on the viability of North Sea oilfields.
Splits and power struggles within the main Hutu rebel groups in Burundi have led to an increase in violence and cast doubt on the viability of the week-old transitional government of national unity.
