A fair number of people have also left a casino with a great deal more than they entered with. That doesn't mean casinos deliver on a promise of profit.
The question was "is there any ICO that actually delivered what it promised?" The answer is obviously yes.
If you were to ask "are startups who run ICOs more likely to succeed than fail" then of course the answer is no. But that's a reality also faced by angel investors and VCs.
You might also ask whether ICO token prices on average went up or down, but that has nothing to do with OP's question at all.
