To be fair, the companies that install these often choose locations where large amounts of people are exiting or encountering the billboard at the intended angle.

The trick also works much better if it's a surprise (your brain doesn't have time to overanalyze) and in a position that is at a sharp angle.

So, exiting a train station, for example.

The animators and designers also perform a lot of tricks (such as parallax tricks and cinematic framing) to really sell it. For example https://www.youtube.com/shorts/-YKfFEL1vjg