Netflix on Thursday reported that its subscriber growth slowed dramatically during the summer, a sign the huge gains from the video-streaming service’s crackdown on freeloading viewers is tapering off.

Netflix beat Wall Street’s expectations on both earnings and revenue, and added 35 million paid subscribers year-over-year, sending shares of the streaming giant up in after-hours trading.

Netflix could report its slowest subscriber additions in six quarters on Thursday as gains from a password-sharing crackdown ease, with investors looking for signs its nascent ad revenue business is accelerating.