Using mobile devices to facilitate a shared buying experience with friends is huge. This app is a first step into this wide open and potentially massively profitable space.
Discounting the future of the business from a landing page describing its very first private beta is not only mean-spirited but also shortsighted.
While I almost agree with your first paragraph, the second made my eyebrows raise (and that's why I downvoted). "mean-spirited" and "shortsighted" are very strong words for a valid question - the grand-parent was quite polite, so no need to be defensive.
Discounting the future of the business from a landing page describing its very first private beta is not only mean-spirited but also shortsighted.