I wanted to ask if if I buy a PC activation key for Borderlands 3 on Instant Gaming, would I get the psycho bundle in Fortnite?
No, you only get the key.
Already bought or how can you explain that?
Not bought yourself, but on key pages you only get the key for the game, which you bought directly, without any additional content. Unless there's something else.
Okay, thank you for the answer!