Netflix has hinted it will crack down on households sharing passwords as it seeks to sign up new members following a sharp fall in subscribers.
The number of households using the streaming service fell by 200,000 in the first three months of the year as it faced stiff competition from rivals.
It was also hit after it raised prices in some countries and left Russia.
Netflix warned shareholders another two million subscribers were likely to leave in the three months to July.
“Our revenue growth has slowed considerably,” the firm told shareholders on Tuesday after publishing its first quarter results.
“Our relatively high household penetration – when including the large number of households sharing accounts – combined with competition, is creating revenue growth headwinds.”
The streaming giant estimates more than 100 million households are breaking its rules by sharing passwords.
Boss Reed Hastings previously described the practice as “something you have to learn to live with”, adding that much of it is “legitimate” between family members. The firm also said account sharing had probably fuelled its growth by getting more people using Netflix.
But on Tuesday, Mr Hastings said it was making it hard to attract new subscribers in some countries.