At their "cheapest" 0.099 euro / $0.11 USD tier it is already literally cheaper per page (albeit certainly not faster) for me to print documents as 8.5x11" 0.1mm thick single layer slabs of plastic on my 3D printer.
An entire "blank" page, i.e. no cutouts for text or anything, would be about 0.754 grams of plastic. That's about $0.0143 per page at a not-too-exorbitant retail cost of PLA filament ($18.99 USD for a kilo) and the material usage would be even less once the negative space for text is subtracted. And I don't even have to buy the paper.
That's mind boggling. Apparently I'm in the wrong racket.