I found this annoying and spammy. It took me almost a dozen clicks to find out where to buy the premium license, and there it says "contact us for a quote" instead of saying what the price is. I'll defer to others about whether this type of post (on the other site we used to call it a slashvertisement) is appropriate for HN but I'm personally not keen on it. I think if I wanted this type of product I could find it myself.