Some people claim that they want personalized ads (at least on HN and similar communities)

I've never met anyone in real life who wasn't creeped out by a targeted ad. Everyone nowadays has a story about how they were having a conversation with someone about something, and then one of their devices served them an advertisement for the thing they were talking about.

Everyone finds that creepy as hell, but it's hard to attribute it to any particular device/company, and even if you find out that it's your Alexa that's spying on you, it's hard to throw it out. Not only is it a waste of money, it's a loss of a convenience, and there's some social pressure involved. Like do you really want to be seen as that one paranoid weirdo who doesn't trust technology that everyone else is using?