90 percent of them are designed to make the devs as much money with as little development as possible.
Just my honest opinion.
It's more than ninety percent. Some experts would say 99%.
Ask yourself, how many of these projects have delivered a working product, with at least 1 million users?
No such projects have delivered a working product with 1 million users that ever existed. Most ICO today are design to make developers rich. They are only good on enticing investors with their product at the start. But once they collected large amount of money they discontinue developing and improving their product.