I’m not sure it’s worth answering the question because to me it almost feels like a straw man in the sense that it’s disconnected from the current reality. I think running a movie trailer before another movies plays and putting up movie posters around the theater is fair play. It’s within the same context and is actually advertising an entertainment product. Further, people go out of their way to watch movie trailers on YouTube.

However, the majority of ads I’m discussing don’t adhere to that. Overall, people are pretty good about finding out about things! If it’s really desired, some will seek it out. Others will learn via word of mouth. Steam is a good example I think where people find games without having to see ads on TV, online, or other areas.