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

https://codysuniquecolumn.talesignal.com/posts/can-i-trust-lucky-symbols-like-7-to-predict-wins

The number 7 is seen as lucky in slots and pop culture because it often appears as the winning 777 combo on classic reels. It’s tied to positive ideas like the seven-day week, symbolizing completeness