[iamben]

I assumed email lists of people who'd taken the personality tests, then maybe LAL off the back of that. How was the algorithmic targeting back then? I know I wouldn't want to manually optimise against it now (with the right spend).

Just to caveat again - not my specialty, but very interesting all the same!

[cm2012]

It's even better now, but in 2016 it was still really good. in 2016 I was using FB targeting to find business owners who were in the market for loans, which is far more specific than democrat, independent, or republican!