>Personalisation simply matches users with the content the algorithm thinks they want to see.
These algorithms aren't matching you with what you want to see, they're trying to maximize your engagement- or, its what the operator wants you to see, so you'll use the site more and generate more data or revenue. Its a fine, but extremely important distinction.
What the operator wants you to see also gets into the area of manipulation, hence 230 shouldn't apply - by making algorithms based on manipulation or paid for boosting companies move from impartial unknowing deliverers of harmful content into committed distributors of it.
These algorithms aren't matching you with what you want to see, they're trying to maximize your engagement- or, its what the operator wants you to see, so you'll use the site more and generate more data or revenue. Its a fine, but extremely important distinction.