On the conversion tracking point, because I just wrote a privacy policy section on this: I just send the conversion event for the ad, but the advertiser almost

On the conversion tracking point, because I just wrote a privacy policy section on this: I just send the conversion event for the ad, but the advertiser almost certainly has all the user info tied to that already, right? I can say "not my department" but still. Of course facebook would prefer you just send it all app events, in perpetuity, just in case.