By Melony Roy

PHILADELPHIA (CBS) - After an outcry on social media last month, Instagram apologized to its users for what it called “confusing language.” It has now revised its terms of service, but may have already lost half of its Instagrammers.

On Saturday, the photo sharing app Instagram will be rolling out its new terms of service agreement with minor changes.

“With the most controversial copyright language taken out it allows Instagram to share information more with its parent company Facebook,” CNET senior writer and Allentown, Pa. native Declan McCullagh said. “This is useful for dealing with anti-spam measures.”

According to app traffic monitoring firm Appstats, Instagram users have fallen from 40 million to 17 million in the last month.

“We don’t know exactly what caused this maybe it’s holiday season and people weren’t using Instagram as much but I think one large factor is the furor over copyright policy this is an example and should be a lesson to other companies that they need to take users rights seriously.”