[dang]

Although the projects you're talking about make great Show HNs, the category is broader than that: it's for sharing something you're making. The main criteria are that it be real (e.g. not just an email signup or findraiser) and that it works (i.e. it's something people can try out and is more than just a blog post).

"Works" means something different depending on the kind of project. I think it's ok for people to post their businesses as Show HNs as long as they have a working product users can try.