That even though the ad banners at the bottom roll through several ads, I have often and maybe simply coincidentally seen a product which is being discussed at the bottom of the thread in which it is being discussed. I am not implying that there OP is in anyway involved, but simply curious as to the means by which the selection is made to which ads run in rotation in the banners and if they are 'targeted' in any way based on the thread topic or at the least, forum heading...
This happens all the time on a Disney forum I'm on. I'm assuming it's some sort of software that selects ads based on specific keywords that may come up on that particular page, even if it's someone saying, "God, I hate TPU cases."