How do you propose getting “informed” consent from an audience who doesn’t care and willingly expose everything about themselves and everyone they know to find out which Star Wars character or 80s pop song they are most like? Genuine question, as this doesn’t seem the least bit a solved problem anywhere.
(Focusing on user consent obscures the actual problem; people often consent to running malware. What matters is whether the software to be run is useful and harmless.)
Ah, but not in an informed way–users don't typically run software they know to be harmful/useless :P (And no, telling them that it is harmful isn't apparently enough to inform them…) But I agree with the first part.