The number 7 is seen as lucky in slots and pop culture because it’s tied to...

https://tysonsinterestingperspectives.cloudhinter.com/posts/how-did-casinos-adopt-the-meaning-of-seven-instead-of-inventing-it

The number 7 is seen as lucky in slots and pop culture because it’s tied to positive ideas like the seven-day week and classic slot symbols like the 777 jackpot