I hate to spoil a good consciousness raising party but it’s still useful to understand why companies do this stuff:
raising prices leads to more backlash than anything else
when costs go up, wholesale prices (per unit of product) must go up to match or the product becomes unprofitable
redesigning the package to fit the smaller amount of product requires very expensive retooling whereas dialing down the amount of product is basically free
You might say “why do they have to be profitable at all?” But then why would they even bother making the product if they weren’t?