We don't remember the vast majority of advertising we see by design. That's how a) it's designed and b) why it's so dangerous. It's quite possible you saw some

We don't remember the vast majority of advertising we see by design. That's how a) it's designed and b) why it's so dangerous. It's quite possible you saw something somewhere about it several days if not weeks or months previously and naturally didn't consciously register it. Advertisements are designed to work this way and the memory is a wonderful thing. It's dangerous because it's manipulative, it removes agency from ourselves and its addictive to the marketeers. It hurts our identity to admit we are manipulated so psychologically we play along with the manipulation and deny being weakened (and they know this). If I can sell you a book and make you think it's entirely your own choice then my marketing has been incredibly successful. Or it may not be doing what marketeers and advertising agencies actually planned to happen and it could be just random coincidence.