I just think you have to be competitive with an Uber/taxi fare if you want people to use this as active transportation. If the price of an Uber for 2 people is around the same price, I think most people are simply going to use that option.
I'm of the impression that this gondola will mostly be used as a tourist experience (as well as a local tourist experience with locals going on it once a year). It will likely also be successful on warm summer evenings on the weekend as people head out to restaurants on downtown/Whyte, and give it a go. In mediocre/poor weather, I really question how many users will continue to use the gondolas. This is also one of the reasons that I am highly skeptical of this business to be able to run profitably without government subsidies (which I am actually on board with for a "reasonable" amount).
Again, I have not conducted studies on consumer demand for this, so I hope my opinion is just that, and wrong. I'd really like for this to succeed as I think it adds a lot to the Edmonton tourist experience, and adds some nice character to the city.