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Twitter disclosed Tuesday that it "unintentionally" used some email addresses and phone numbers for advertising even though the information was provided for account security.

Why it matters: It's the latest example of a tech company misusing user data.

"We cannot say with certainty how many people were impacted by this, but in an effort to be transparent, we wanted to make everyone aware. No personal data was ever shared externally with our partners or any other third parties."
— Twitter said in a blog post

But but but: The information was used to help tailor which advertising some users saw.

"As of September 17, we have addressed the issue that allowed this to occur and are no longer using phone numbers or email addresses collected for safety or security purposes for advertising."

  • It's not immediately clear why Twitter is only now notifying users.

Meanwhile: While in Twitter's case the use was accidental, Facebook intentionally used phone numbers provided for security to target ads — at least until the FTC complained.

Go deeper

Diamonds see demand spike and prices follow

Illustration: Aïda Amer/Axios

Diamond prices are up because demand is growing — despite the country's recent emergence from various forms of lockdown.

Why it matters: Diamonds were a big pandemic-era winner, when U.S. spending flowed out of service, travel and experiences into goods and high-end products.

Blockbuster Supreme Court day

Photo: Drew Angerer/Getty Images

The Supreme Court will give conservatives a lot of what they want — but not quite everything.

Driving the news: It voted 9-0 to carve out religious objections to same-sex marriage, saying foster-care agencies have a First Amendment right to turn away same-sex couples. But it also voted 7-2 to preserve the Affordable Care Act, saying Republican attorneys general did not have the legal standing to bring their lawsuit.

Biden signs bill making Juneteenth a federal holiday

President Biden and Vice President Harris with members of Congress after the signing in the White House on June 17. Photo: Jim Watson/AFP via Getty Images

"Great nations don't ignore their most painful moments," President Biden said before signing legislation Thursday that establishes Juneteenth as a federal holiday, just two days before the occasion.

Why it matters: The holiday, which will be known as Juneteenth National Independence Day, is now the 11th annual federal holiday and the first one established since the creation of Martin Luther King Jr. Day in 1983.