Perhaps they think if the beeping annoys you, you'll click on it to make it stop?

Personally, any advertisement I see which irritates me, means I consciously never, ever, have business with that particular organization. GEICO's commercial with the dollar bills with the eyeballs on it for example, which is found on almost every TV channel and it constantly blares the same song... means I hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate, hate GEICO, and I won't be buying insurance from them.

I remember the .org had an audio ad for the movie "Superbad", which was annoying as all (expletive). I promised myself I would never, ever watch that movie. EVER.