In the UK, the bbc.com link redirects to bbc.co.uk and the notification footer auto closes before even have a chance to read it.

And if it is an ad, doesn't the FTC require it to be labelled as such?

Why would the US FTC have any jurisdiction?

Because of US audience.

There was a case where UK based influencer got into FTC trouble for the CSGO Lotto gambling site. He was promoting it without disclosing he had a stake in the site.

CSGOLotto Inc. was registered in the US.