I received an email from Apple Search Ads perporting to be a summary of last month's impressions and installs, etc., but it's not my app. It's some other developer's app.
The email subject was "View your last month's results." and contained data for "Installs", "Avg. CPI", and "Spend".
This seems like somewhat private information I wouldn't want apple sharing with other developers, so I won't post a screenshot here. Somehow Apple seems to have gotten their wires crossed.