That might be true, for very specific market dominating companies, but these wouldn't really need any new advertisement. I'm not going to forget anytime soon, that CocaCola exists.

For all the other companies its exactly the other way around. I will see products of a company, I know bothers me when I want to do something else, and a bunch of products I have no (negative) opinion yet. Guess which products I will evaluate?

For an ad to leave a good impression it must be actually good, otherwise it achieves exactly the opposite. People used to buy advertisements, the ad industry destroyed this, by forcing people to look at ads. People don't like being forced.