I'm seeing general social media links, but very little content other than that. Almost no personality data for anyone I tried. If I put in a reasonably well-known HN user, [email protected], I am struggling to see any insight at all being returned.

it relies on twitter data a good bit for personality insights Peter, so people you tried are not twitter users perhaps?

try a couple of random twitter users, don't have to be popular, if you just want to get a sense.