ActivePDF lost the battle against SPAM
I personally will investigate why your email has been used in such a manner. activePDF does not, nor has it ever, "sold" email addresses to 3rd parties
I decided to take the post offline until ActivePDF had a chance to investigate the SPAM. I got another mail from ActivePDF a week later asking me to hide the post for a while longer so I told them I would hide it for another week.
2 weeks later after the first post I am back to square one: I gave my e-mail address to Active PDF and now someone else has it. If they sold it for profit or gave it away for free does not really matter. All I know is that I, or my clients, will never use their services again.