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

https://zulu-wiki.win/index.php/What_Does_the_Number_7_Mean_in_Popular_Culture%3F

The number 7 is seen as lucky in slots and pop culture because it often signals big wins, like hitting “777” on classic reels. It’s also linked to positive ideas like the seven-day week, making it a familiar symbol of good fortune and balance