I would assume it is pretty standard. I work for a non-FAANG very well known company, and its requirements for a social media post that mentions the company nam

I would assume it is pretty standard. I work for a non-FAANG very well known company, and its requirements for a social media post that mentions the company name are so strict it is just easier for me not to name it. The formal justification for that is that the definition of advertising can widely differ between countries - that can include social media posts by employees; and given that advertising itself is in many cases strictly regulated, certain annoying precautions should be taken. Additionally, FAANG already gets a bad rep on multiple fronts; preventing employees from releasing their dirty laundry (and it can safely be assumed to be exceptionally dirty) is in their interests.