@jmcrookston Very easy to do.
Also easy to engineer it so that you see more positive tweets than negative ones, apparently 3:1 is the optimal ratio for mental health.
Tech titans absolutely know this, they just decided not to to maximise dwell and hence advertising time from their platform.
It's never going to happen at the commercial sites for the reason you already expressed, but it would be a nice aspiration for some of the independent or open source solutions.