Netflix Inc (NFLX.O) beat Wall Street earnings estimates for the first quarter but offered a lighter-than-expected forecast on Tuesday, demonstrating the challenges the mature streaming service faces in its pursuit of growth.

The company said it shifted a wider launch of a plan to crack down on unsanctioned password sharing into the second quarter to make improvements, delaying some financial benefits, but said it was pleased with results so far.

As the streaming video pioneer faces signs of market saturation, it is looking to new ways to make money, such as the password crackdown and a new ad-supported service.