What do you mean spamming? Did you even read about the method at all? You simply create a viral effect promoting your product through social media, with a "Pay With a Tweet" feature, not spamming the PDF for everyone to view.
It's not like your getting pop ups, the referral links are also to show an example of the method.
Okay, Bitcoin7, we totally believe you.
LOL.. That just made me laugh, believe what you want. Kids under the age of 12 shouldn't be allowed on the internet.