I had really hoped we were past the "landing page" concept at this point. Yes, if you can get people to pay, that validates the ideas, but a landing page is mostly a validation of the marketing, not the product. And it could be complete throwaway work because once the product hits user's hand, they will correct the details that are wrong, and your initial "landing page" is outdated instantly.

Better to talk to people and iterate on prototypes with a handful of pilot users until they are willing to pay, them expand beyond the pilot group. Not only it is real communication and iteration with users, we aren't spamming the world with "landing pages" of products that do not actually exist.