Looks like this is from a property of a recent acquisition (associated content, acquired in 2010). Most likely a dump of old tables before authentication was mi

Looks like this is from a property of a recent acquisition (associated content, acquired in 2010). Most likely a dump of old tables before authentication was migrated to login.yahoo.com. Should've dropped these tables after the migration. I personally have no sympathy for these "users", as they're professional content spammers :)