TBH, if a service doesn't explicitly say what data I expose to it _won't_ be shared, I assume it will be immediately and repeatedly.

Though also if a service does explicitly say the data won't be shared, I still assume that it will eventually be given to the highest bidder, then the next highest, and the next, and so on. If not deliberately, it will at some point be hacked from without or unofficially exfiltrated from within.

And on a public site like HN all bets are off as the information is probably being scraped by everyone, their dogs, and their dogs' fleas, even more so now LLMs are such a big thing.