McDonalds didn't want nutritional information on hamburger wrappers, cigarette companies didn't want health risks mentioned, Apple doesn't want consumers to be conscious of how they pay $150/year to Apple for every $10/week subscription. Transparency is good for consumers, not companies.
Conflating tax with profit margin is a bit muchthough don't you think? If Facebook wants this, they should be willing to indicate how much margin they make on every ad buy they happily take money for.
