Imagine the power you’d have if you had people literally following orders based on a system of life that you’ve designed. And follow it they might if the perception of outcomes is positive.
Elo rankings (not ELO) was first adopted in 1960, which while technically overlapping with computing's timeframe, the two are unrelated. Certainly Elo was not invented to play online chess or for the sake of computer-aided chess by any stretch.
As of mid 2019 26 million air tickets and over 4 million high speed rail tickets were refused based on SCS. Also some personal information is openly published about people with low SCS.
There isn't one. We're simply the result of a bunch of lucky events and evolutionary forces.
I know some of my habits are awful (brushing teeth, exercise as of late, going on any walk outside) so I setup my phone to remind me every date at a specific time.
Can some of these be predetermined by an engineer? Yes! Can all of them? No.
Are not notifications intended by engineers to dictate a behavior? "To use my product" to what end various products are a means (Facebook, reddit, HN etc). I'd argue any product/system to which we join encourages us to follow it if we find it rewarding, regardless of positive outcomes (though surely the short term just look positive else what incentive exists to start?)