I specifically avoid products i see ads for, cause the product can't be that great if it needs obnoxious advertisements, so the effect is more than subconscious. Now, i don't see many ads cause i block all of them where i can and roadside advertisements are not allowed here in Germany, but even if i was, i am of the opinion that the effect of this subliminal manipulation is severely overstated by the people selling ad space. I think the idea that i would buy something just because a company writes their name everywhere is ridiculous and as far as i know studies show that the effect on buying decisions is basically not measurable. I think the entire value in advertisements is just more people in general knowing of a brand.