I guess by ineffective he meant for the "greater good".

This raises a new question. It seems like it has been established by Facebook, Instagram, Twitter etc that :

Maximizing shareholder value => maximizing time spent on the app => maximizing engagement => maximizing "sensational" and trash content

So do you believe that these implications will hold forever ? Now that this seems like the status quo, is there a chance for a new social media to exist where the first premise doesn't imply the others ?