Twitter Apologizes for Using Email Addresses and Phone Numbers for Ad Targeting
It's normally Facebook in the firing line over personal data misuse, but this week, Twitter has admitted that it has also been misusing people's personal information for ad targeting purposes.
As noted, Twitter has found that people's email addresses and phone numbers, which they had provided purely for account security purposes, had been used to match them with more relevant ads.
The process involved the use of Twitter's Tailored and Partner Audience options, through which brands provide their contact listings and Twitter matches them against the profiles in its database.
As explained by Twitter: