I really don't understand why you would submit the site to hackernews then. You only have one shot at a first impression especially if your service is a paid one and you're trying to make a sale. By not having an explanation of what the site's purpose, functionality and benefits are, you frustrate visitors that initially go to the site and risk them just writing it off.

It's a shame because after reading the explanation you give for your service, this is something that IS extremely useful with a low bar of entry. Please update the site as I would hate to see you lose revenue.