I know they don’t subsidize standard development. But there is still cost for running an organization to manage and coordinate (and maybe translate) what is being standardized over hundreds of topics. Of the 40 million in total income, selling standard documents is 1/4 to 1/3 of their income. You don’t pay for the cost of electronic copies, but for running the organization.

source: https://www.iso.org/files/live/sites/isoorg/files/store/en/P...