How does some tiny org harvesting some data harm FB? Will FB sell fewer ads because some third party extracts mother's maiden name, make of first car, home stat

How does some tiny org harvesting some data harm FB? Will FB sell fewer ads because some third party extracts mother's maiden name, make of first car, home state, and whatever else is revealed in response text? Will the third party org serve ads to those people outside of FB? Or, will they use that information to hone a FB strategy, potentially meaning a net increase in the number of ads bought AND giving FB enough distance that it wouldn't be an actionable scandal when it was inevitably discovered (like with Cambridge Analytics)? I really don't see much actual downside for FB in allowing this kind of data collection. The people (like myself) who are disgusted with FB and think FB is a profoundly negative force that is strangling local journalism, toxifying the discourse, and stroking rage are already against FB. But most people just don't care (and may actively appreciate those effects) and won't change their behavior in response to FB allowing another likely election-outcome-altering disinformation campaign to do recon work. And FB knows that. As long as Zuck feels safe from regulation, he's not going to stop, address, or reduce any non-CSAM thing that would threaten growth or time-in-app.