I went through the earlier process of objecting to personal data processing.
Since then, my feed has been 25% videos of trains and model railways, 50% vaguely sexist or sexual jokes (blondes, 'little Johnny' etc) or cartoons, 25% posts from random Anglophone police forces showing them catching speeding cars, or advising to use seatbelts.
As a whole I think it's good evidence that they no longer use anything they know about me to show the adverts.
Since then, my feed has been 25% videos of trains and model railways, 50% vaguely sexist or sexual jokes (blondes, 'little Johnny' etc) or cartoons, 25% posts from random Anglophone police forces showing them catching speeding cars, or advising to use seatbelts.
As a whole I think it's good evidence that they no longer use anything they know about me to show the adverts.