Read the caveats at the bottom of the article -- the ship owner who has to make the capital investment doesn't pay for the fuel, so there's a perverse disincentive to invest in this technology (assuming it works).
Maybe the SkySail could own the sail system and sell the "thrust" - basically charging a success fee for saved fuel. In a similar vein in how the airlines don't own the engines of their airplanes but rent them from manufacturer - https://aviation.stackexchange.com/questions/12528/jet-engin...
Of course this is an armchair thought experiment, but I am curious about your opinions.
Not really a disincentive, if the person paying the fuel could pay less it for it while using fleet X it would surely be a competitive advantage to the fleets owner. Perhaps the keyword in the quote is "untested", with a unwritten "why bother unless I have to / other owners do it".
Exactly. The key hurdle is getting the first ship fleet owner to invest in the technology. Once that's working, he'll have a competitive advantage offering renters lower fuel costs. He'll have some combination of higher booking rates or ability to charge higher prices, effectively splitting the gains
Of course this is an armchair thought experiment, but I am curious about your opinions.