The pile of receipts

I think of "just sitting there, waiting for a luck to make me rich $.$" Haha.

Taiwanese make a great hope of these pile of receipts. The prize is from NT 200 - NT 10,000,000

First thought in my mind is why do they have this thing?

So I start googling in my browser with "taiwan lottery receipts" keyword. and i found it interestingly on this site. Check it out!