Each valid login+password got the scrapers many many profiles. 23andMe has a feature that lets you see people you're related to and view their profiles. My gue

Each valid login+password got the scrapers many many profiles. 23andMe has a feature that lets you see people you're related to and view their profiles. My guess is this feature had few rate limits and allowed you to view the profiles of people very distantly related. So perhaps with a couple thousand valid account logins you could eventually look up the profiles for 1.3M users.