I don't see what's wrong here: every company in the IT world releases open source components: Django, Bootstrap, Foundation and React itself are open source projects backed by companies. But there's also smaller things being released every day, and each of them contributes to the great world of open source.
We use open source, we give back to the open source community. We are giving away our time for free releasing a component, I don't see anything bad adding a small link to our website.
And that is even without that contextual information that you've noted.
> Show HN is for something you've made that other people can play with. HN users can try it out, give you feedback, and ask questions in the thread.
https://news.ycombinator.com/showhn.html
There is nothing even remotely inappropriate being done here, except for your comment, which violates the self-same rules:
> Be respectful. Anyone sharing work is making a contribution, however modest.
Either way, your parade of horribles is unlikely to occur, or be that horrible if it were. To each their own though.