Have a look at this; an ad showing a Burger King burger going mouldy, supposedly to demonstrate lack of preservatives. Well, my guess is that whatever preservatives one put in a burger, after a few days it will go rotten, let alone 34 days. So, what is the point? It certainly has created the mental image of burgers = mould in my mind, somewhat counter-productive, I think.
https://10daily.com.au/amp/shows/theproject/news/a200220rpwud/burger-king-launches-its-mouldy-whopper-campaign-20200220