Something entirely new is happening in the world. Just in the last five or ten years, nearly everyone started to carry a little device called a smartphone on their person all the time that's suitable for algorithmic behavior modification. [...] We're being tracked and measured constantly, and receiving engineered feedback all the time. [...] Now everyone who is on social media is getting individualized, continuously adjusted stimuli, without a break, so long as they use their smartphones. What might once have been called advertising must now be understood as continuous behavior modification on a titanic scale.

— Ten Arguments for Deleting Your Social Media Accounts Right Now by Jaron Lanier