Welcome to Can’t-ada!
There’s too much money not to figure it out. I fell into a rabbit hole yesterday reading about wood and wood product imports from the US and there are a pest of ways this could be an issue including pests.
Considering most of this is processed, steamed, pressured and/or glued from real wood it seems to skip most bio concerns.
We can only guess but I’d imagine our sample packs differed in that it wasn’t classified as a wood product. When it’s just the proofgrade that changes.
For all the noise I made about being in Canada where you are knee deep in wood finding 1/4 to 1/8 sheets I can feed the GF has been surprising. I can’t wait to be able to buy laser safe, GF approved food for it.