Thank you, that is what I thought, but I have all the skills and have harvested masses of paper. Anyone know the actual requirements, is there any way to find out?
I can't say for certain because the time stamps don't show but I was first dealt, and bought, the upgrade card the same day I received the 73 Paper Trees harvested achievement, "Paper Plucker".
You don't seem to have that achievement yet it seems like that might be the prereq.
I got that upgrade on May 3rd. I do not have the upper paper harvesting badges and was (maybe) level 36 or 38 back then. I did have all the skills at that time (other than TR2) and had gotten the Sheet Snatcher (283) achievement on April 28th.