This little thought is in relation to What Medium is for and related things I have read.
I think what all we Medium-hesitants worry about is this: it is too Twitter. Medium is extremely pure, clean and focused. It is about doing a task in an extremely focused manner. I have read quite a few articles on (through?) it already, and I enjoyed the experience very much. And here comes the big thing: it has no clear way of making money without becoming less pure. After feeling burned by Twitter gradually watering itself down to make money, we feel hesitant to embrace another thing like it. Now, we want to be clear about how services plan to make their money. We want great things to remain great.