Basically I see two options:
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This works for advertisers and based on your “profile” you are strongly influenced by the ads shown to you. So might just as well give your data to Meta and Google, who already sell profiled (and not individualised) ads.
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This doesn’t work for advertisers and you are not strongly influence by the ads shown to you. So the advertisers could just as well put a link somewhere and hope it is found by their target audience.
Also I don’t my browser, my OS or any other core component on my system to be in bed with people who are trying to extract as much money as possible from me.