Facebook's photo-sharing site Instagram has updated its privacy policy giving it the right to sell users' photos to advertisers without notification.
Unless users delete their Instagram accounts by a deadline of 16 January, they cannot opt out.
The changes also mean Instagram can share information about its users with Facebook, its parent company, as well as other affiliates and advertisers.
The move riled social media users, with one likening it to a "suicide note".
The new policies follow Facebook's record $1bn (£616m; 758 euro) acquisition of Instagram in April.
Facebook's vice-president of global marketing solutions Carolyn Everson earlier this month had said: "Eventually we'll figure out a way to monetise Instagram."
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