Effectively Instapaper has found a way to keep its users engaged with the site’s main purpose, reading, while offering users ways of keeping tabs other readers. It’s like getting a peek at someone else’s bookcase, without them knowing that you peeked.

Imagine what would happen if Twitter operated this way: you have no inkling of who is following you and others have no clue if you are following them. You just have an account that you post to, occasionally a person responds to you. The only way you know if a person is following you is when you go to Direct Message them.

Imagine that, because what would really change?

Ben Brooks – The Masked Social Network.