@Ric

It depends on the "big brand" in question, I think.

If news organizations would set up their own fedi instances, encouraging individual employees to make their own professional accounts there, that would be awesome - I'd be more easily able to find reporters and analysts covering things I'm interested in.

If Nike or BMW make an account on dot social and have their social media team manage it along with all their other ad accounts - meh. Do not care.