The number 7 is seen as lucky in slots and pop culture because it often appears...

https://www.fastbookmarks.win/the-number-7-is-seen-as-lucky-in-slots-and-pop-culture-because-it-s-tied-to

The number 7 is seen as lucky in slots and pop culture because it often appears as the winning symbol, like the classic "777" jackpot on slot machines