How do you think Meta and other similar companies attract advertisers? They sell ad space to them with the ability to highly target ads to their users.
That’s what I mean by sell - they are literally letting advertisers buy ads to target to all of the people who they’ve gotten information about that would most likely click on and convert to buyers. Non-targeted ads are significantly less valuable from an advertising standpoint because if they don’t apply to you, you’re more likely to ignore it and the advertiser is getting less money back on their ad purchase investment.
lemmy.ml is down right now. You’re going to have to wait until it’s back up to ask them - this question/answer is just local to lemm.ee until it comes back up and can appropriately federate.