To earn some extra money, a person can upload a PDF to Adobe, and they will scan the content in the PDF and embed ads into it. Your PDF is then returned to you.
The catch is, you don’t get paid until someone clicks on the embedded ad. So it’s likely that you’ll get a junked up PDF returned which no on clicks on, and in turn you make no money. Thus sticking you with a cluttered, non-money making PDF.
I think this is just too much. People don’t need ads in their personal documents.