I agree that the landing page needs some work to make it clear what the product does, and why I would want to pay for it. However I disagree that you must star

I agree that the landing page needs some work to make it clear what the product does, and why I would want to pay for it. However I disagree that you must start by offering the service for free. By charging from day one, you can limit your user base only to those people who are prepared to pay for it. You're less likely to get explosive growth this way, but it's easier to keep the service running as you're not subsidising freeloaders. One of the assumptions in an MVP is that people are prepared to pay for the service, and you can only establish that by requiring people to part with cash as early as possible.