Brighton & Hove attracts 8.5m visitors each year, (6.5m as daytrippers), putting £970m into the local economy. The Pier has 4.5m visitors (admittedly it's free).
Why is 800,000 visitors to the i360 'utterly daft'?
Look at the figures for the Spinnikar - they now only get nearly a quarter of the proposed 800k figure. The Brighton Wheel ? 250k a year. To hit 800k visitors a year they would need to find 182 people an hour willing to pay for twelve hours every day of the year. To extrapolate the likely visitors to the i360 based on how many people visit the city each year is a false calculation.
Besides, if private enterprise thinks it's unworkable ( and they do otherwise they would fund it ) then what makes the council think THEY can make a success of it ? Making the council taxpayer potentially liable for £36m of re-payments ( plus interest ) is a risk not worth taking.