They get old fast. A few really iconic adverts I could imagine watching once per decade indefinitely, but for most the first time is enough, and where an agency made several similar ads I probably don't need to see all of them even once. Here's an example of an iconic ad I grew up with that I could imagine wanting to see again some day:

https://www.youtube.com/watch?v=zPFrTBppRfw

https://en.wikipedia.org/wiki/Accrington_Stanley_F.C. -- for US readers, the UK has a "football pyramid" in which there's a hierarchy, the elite sport teams you've probably heard of compete in a national league, but every year the worst of those teams can be replaced by the best of those from the league below, and this repeats in layers like a pyramid, until eventually you're talking about friends or co-workers, who play other similar teams in their local area maybe in some public park for the love of the game. Accrington Stanley is in the middle of that pyramid, it's hiring professional players and has a dedicated ground to play football, but we're not talking superstar lifestyles or billion dollar stadiums.