This just hitting demographics and to prevent the racisalisation of a brand in the fragile mind of the brain dead consumer.

Have a brand / product advertised by a full black product, and everyone who isn't black thinks "this is a 'black' product for black people, and I'm not black so it's not for me"

To a lesser extent this is the same if a white family.

So by having multi-race it becomes non-race.

Unpopular opinion no doubt, but I know people who work in advertising and they really don't give a fuck about trying to manipulate society with their adverts, that's what films, TV and the 'news' is for.

They care about ROI, engagement, and effectiveness of the campaign, as this is what determines their rates and bonuses.

Working in an advertising agency is often referred to in professional circles as "working for the dark side" with the obligatory joke that their "selling aspirin to kids" as a good agency is supposed to have no morals.

So it's not that they are trying to encourage race mixing, it's that if they're actions cause that, they don't give a fuck.

I laugh at the idea that someone managed to get all the advertising agencies in one room and convince them to do anything even remotely against their own interests