I have noticed a few posts promoting a product called HiqPDF wihtin a short time frame, and I wonder if it is the same person using different user names. If this is the case, would it be considered spam? As a side note, the answers promoting this product seem to be on-topic.
Here are some examples:
There used to be an answer also in this question from yet another user, but it seems it was deleted. Maybe 10k+ users can still see it: Is it possible to generate PDF using jQuery?