Yeah, um, that's exactly how it works.
If I don't remember the ad even existed how could I buy something because of it?
I think you underestimate the power of ads on your subconcious. In many cases it is also not so much about prefering one brand over another but instead being aware of a product in the first place.
Anyways, as mentioned before game announcements are ads. I am pretty sure you had lesser games and more money if game companies would not announce their releases on conferences with flashy videos. You wouldn't probably have heard about half the games you own.
What effects do ads have on subconscious? Sure they spread awareness but being aware of a product don't necessarily mean you'll buy it.
I specifically seek those out so I don't count those. Intrusive ads like when watching videos or browsing a site like this have never gotten me to buy product I wouldn't have otherwise. When I need something I do my own research, look over and compare various options n stuff.
Its hot.... your thirsty,.... and suddenly you remember...
(in the old days)
Its like one of those AMSR videos or something.
Hell Santa used to be blue..... but Coke's logo was red, so they changed his outfit to match the logo's colours.
For real, Coke changed Santa from being blue? All the more reason why I don't drink it then!