[mseebach]

The point of funding Dash buttons is that they're free for the consumer. You're locked in, only so far as you can't be bothered to throw out the button, or just not push it, or instead push the button provided to you for free from a competing brand.

That said, it's almost impossible to imagine that a future where Dash is successful doesn't contain configurable buttons like the ones you describe - they probably just won't be free.