ISO is problematic

Right, because ISO is a creature of its constituent national bodies, and the national bodies are exclusively controlled by sovereign entities, the funding of ISO is entirely in the gift of the sovereign entities ("Countries"). They can, and perhaps should, just pay for it and stop messing about with for-$$$ PDFs.

And yet, I suspect in the largely democratic or semi-democratic countries that have the largest economies of those sovereign entities, and thus would be in the best position to just fork over the cash, such a decision would be a political matter, and "Give money to ISO" is not a vote winner. Still, if the $$$ PDFs annoy you, tell your Congress member or equivalent what you want them to do about it.