TIL that in 2020, Burger King ran an advertising campaign featuring a picture of a moldy Whopper, to prove that their burgers are made without preservatives. This unconventional advertising method worked, increasing sales by 14% (according to multiple sources.)
The burger turned ten years old back in 2019. Sadly, it looks like the live stream is no more, and perhaps neither is the hostel that was the burgers home.