Facebook buying Instagram for $ 1 billion , as photo-sharing app hits mainstream . Some Instagram users express outrage at the sale and threaten to pull their photos from the app . Comment:
Facebook buying Instagram for $ 1 billion , as photo-sharing app hits mainstream . Some Instagram users express outrage at the sale and threaten to pull their photos from the app . Observers say Facebook is n't as cool as it used to be because it 's so rich , popular and powerful .