This is a great point. Everyone who has talked with chatbots at all: please note that all contents of your past conversations with chatbots (that already exist now, and that you can't meaningfully delete!) could be used in the future to target ads to you, manipulate you financially and politically, and sell "personalized influence on you specifically" as a service to the highest bidder. Just wanted to make sure y'all…
Honestly, retargeting/personalized ads have never bothered me. If I'm gonna see ads anyway, I'd much rather get ads that might actually interest me, versus wildly irrelevant pharmaceutical drugs and other nonsense.
I'd rather see totally irrelevant ads because they're easy to ignore or dismiss. Targeted ads distract your thought processes explicitly because they know what will distract you; make you want something where there was previously no wanting. Targeted advertising is productised ADHD; it is anti-productive.
Like the start of Madness' One Step Beyond: "Hey you! Don't watch that, watch this!"