The announcement marked a big increase from the 5 million users the company disclosed one year ago.
Netflix has won the streaming rights to two NFL games set to air Christmas Day.
The jump comes at a time when streaming companies are facing stiff competition and introducing bundles with their rivals to retain subscribers. Netflix, which launched the ad-supported plan in November 2022, said that 40% of all sign-ups come from those plans in the countries where they are available. In the fourth quarter, the majority of gross subscriber additions for the streaming industry came from ad-supported plans for the first time, data from research firm Antenna showed earlier this week.