> The main concerns are not the ads themselves

^ This.

> but the uncontrolled amounts of information that are being collected to tailor those ads

^ Especially this. (side note: funny thing how so much of this information is gathered, yet targeting is still so bad)

> the emerging tendency to try to get users addicted to content so they can see more ads

Also very important. These platforms don't build features with "how to make things better for users" in mind, they do so with "how do we increase user engagement for ad spend" (see Snapchat as a prime example)