So I read an article today about the win of the mega millions jackpot, and that the prize pool was increased by the time of drawing. I am Australian where our lotteries work on a parimutuel basis where 60% of sales in a drawing are divided amongst the prize divisions. And the advertised division one prize is the minimum prize for that drawing and if they don’t sell enough entries to cover that the lottery operator has to eat it and cover the shortfall from their own funds if it is won.
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They work more or less the same way as yours. If nobody wins onw drawing, the funds are rolled into the next drawing. If this happens a few times in a row, the top prize can get huge. As the prize gets bigger, more people buy tickets, which makes it increase even faster.
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