I have a hunch this was written by a non-native English speaker (see the quote usage near the beginning). Anyway, I think he's saying that our faces, which all

I have a hunch this was written by a non-native English speaker (see the quote usage near the beginning). Anyway, I think he's saying that our faces, which allow us to communicate without words (the last sentence of your quote), are now nothing more than static images/advertisements (e.g., profile pictures). Communication on social networks has been reduced to using advertising techniques to gain attention.