It's another thing to do practically nothing but self-post, only about a single topic, with links to only a single site -- a site that is selling a product.

I think where you fall down is that submitting all the articles yourself. It removes a lot of the authenticity from the notion that someone independent to your company thought your post had merit to be on HN. That is also why usually it's frowned upon to submit your own blog posts to HN.

Also the anecdote to pitch ratio of your phone screen post makes it feel to me that the only reason you crafted the content was to be able to make the pitch in the first place.

It all feels like this the discovery of your service is being being done by force not osmosis.

I was under the impression that self-posts were not frowned upon. I've found some of the best content here to be self-posts.

There's nothing wrong with the odd self-post, especially if it is a Show HN/Tell HN or whatever. But almost all of your recent activity of your account is promoting either your company, your event at SxSW or your personal blog.

How many self-promoting posts do you need to make before it becomes reasonable to ask whether you are fairly contributing to the HN community? Perhaps you could use your ability to identify successful content to curate and promote the work of others too by submitting more content created by others?