You are both correct. The title is bad since it says "Trello leaked 15M email addresses" but the email addresses were already leaked and were used to look up th

You are both correct. The title is bad since it says "Trello leaked 15M email addresses" but the email addresses were already leaked and were used to look up the additional details. It is still leaking (names and usernames), but Trello didn't leak 15m email addresses.