It didn't in this case either, it changed because a group of private platform vendors decided they agreed with the rationale one of the other vendors had for changing something.

Why do you not consider that to be "top down orders"? Sure, the orders came from a few execs at a few companies, rather than from the president, but it still looks top-down to me. Specifically it looks top-down in contrast to slang changing rapidly due to current events (which was the original context), which involves a bunch of people having a new reference point, and choosing to use that in their speech.

So not very far away from an oligarchy as paulddraper pointed out?