Wow, you are actually justifying this? HN should remove this story submission... I didn't realize people could even submit their own articles let alone their own ads here.
As for the article itself, it's a well-written, factual, detailed piece on ad-blocking. My affiliation as a guest writer is at the top of the page in the byline. The 2 sentences can be seen as promotional perhaps but they have no effect on the rest of the text and are actually on-topic in the section they're in where I'm discussing better approaches to the current status quo.
I submitted this to TechCrunch and it passed all their reviews. I did bring up the fact that I included my company in the article but they had no objections and I defer to their judgement as the owning publication. Maybe the byline should be bigger but that's out of my control.
Regardless, thanks for the feedback. Can you let me know how it would've changed your perception if I didn't include those 2 lines?
EDIT: Judging by the downvotes I'm saddened by how many HN readers can't seem to let content stand on it's own merits.