Ask HN: What happens if your landing page doesn't collect enough emails?
Regarding setting up a landing page to collect emails, to gauge the interest in a prospective idea/product.
If all things go well, you get a sizable enough mailing list to launch with.
However, what if you only get say 20, and determine it not enough to move forward with the app? Best to just leave those people and move on? Or a courtesy email?