First, you'll never win the grand prize.
noone ever does.
Second, you usually won't win more than $200 and if you're lucky, $1000, which you can claim at most local banks. Bring your ARC or passport. There's tax on prizes over a certain amount. A friend won $10k once, but had to pay 20%.
I collected these for almost ten years, a mass of receipts in a drawer, then, arranging them carefully in order by last digit, then, just unfolding them and clipping them together. Now, I just leave them at the counter of 7-11, etc. Can't be bothered anymore...I'm just not lucky.