My question then is, when does this exploitative behaviour become criminal.
And if it isn't criminal, how do we make it so.
If you are working for Meta and you consider yourself a moral person, you should quit your job.
There are more important things in this world than making money. Help build a better world. You can live a comfortable life without helping Mark Zuckerberg ruin the planet. You can even make a lot of money, if that is what you dream of.