Ms Hossam, 21, and Ms Eladham, 22, had been sentenced to two years in prison and fined 300,000 Egyptian pounds each in July.
Ms Hossam, who had over a million TikTok followers, was arrested after encouraging women to post videos on Likee, a streaming app that allows users to make money based on the number of followers they attract.
Ms Eladham, who had 3.1 million TikTok followers and 1.6 million Instagram followers, was accused of posting lip-synching and dance videos that were deemed indecent. She also used Likee.
“Now there’s another extension for the same case, for the same acts, but they put different charges to keep these girls prosecuted,” said Mr Abdelnaby, who is executive director of the Regional Centre for Rights and Liberties, a non-profit organisation.