That's true but they are only 6 weeks in. If they can do this, they can probably add new interesting features which get them loyal users over time. I like to be

That's true but they are only 6 weeks in. If they can do this, they can probably add new interesting features which get them loyal users over time. I like to be hopeful rather than cynical by default. Edit: I just realised you still didn't answer my question. I ask it sincerely: What dynamics do you think it needs to have staying power?