> They're just testing it with their friends in closed alpha/beta; That's being generous. I know I've read "startup advice" to make a landing page with your id

> They're just testing it with their friends in closed alpha/beta; That's being generous. I know I've read "startup advice" to make a landing page with your idea and get signups, and then build it only if it gets some interest. I don't think that's good advice for fields that evolve daily anyway, by the time you gauge interest, the world will have moved on or someone else will have built the product.