Is this a case of "it takes a thief to catch one"? Because looking at who is behind this, they seem to have more experience in abusing (rather than protecting) privacy and user rights.
"Neeva was founded by Sridhar Ramaswamy (ex-SVP of Ads at Google) and Vivek Raghunathan (ex-VP of Monetization at YouTube)"
I can't help but wonder what clause there might be in the user contract (with teeth) that would prevent a future pivot or buyout or redefinition of the "Digital Bill of Rights" after all that juicy user data has been collected.