It’s interesting all the focus on opt-out from training. Sometimes I worry there is an intentional focus on that so people don’t think about the other ways the company might be profiting off our data. Like I pay for Anthropic and they don’t train on that but are they selling my “anonymized” usage data in some other way?

From what I recall, these companies don't offer any option to opt out of your session transcript data being used (and sold!) for "regular" adtech targeting purposes.