There's a vast distance between directly effecting the substrate of thinking chemically and reactions to rewarding stimuli coming in normally.
If you scan the brain with an fMRI, the reward pathway lights up and suggest over time you will have reinforced that pleasurable activity and have created a strong affinity towards repeated activations, further strengthening those pathways.
Have there been any studies to show withdrawals from inhibiting consuming pleasurable visual media?
I mean if you were watching a series on Netflix that really resonates with you and you make a strong connection with the characters and feel as if you are a part of the scenes taking place (game of thrones etc), with characters faces activating your fusiform gyrus and dramatic scenes activating your amygdala making you emotional etc, how is autoplay facilitating the pleasurable dopamine response from imagining/anticipating/looking forward to how great the next episode will be, not as compelling of an issue as consuming exogenous substances that activate similar dopamine release?
All autoplay does for me is saving me the click on next which I'd click 100% of those times when I don't close Netflix right at the end of the old or start of the next episode.
I can't even understand how it would make people watch more (unless they barely watch and just didn't realize a new one started)