Have been buying Powerball, Mega Millions, and California Super Lotto tickets regularly for years.  My playing began when a guy in the office I worked at once won the California Super Lotto.  I spend about $40-$50 a week, which sounds like a lot, but I can afford it.  The most I've ever won was a few hundred dollars.
Over the years I seen people do crazy purchases.  Numerous times I would be in line to buy tickets and the person in front of me would buy $50-$100 worth.  The worst was one time there was one of those gigantic Mega Millions jackpots, about half a billion dollars, and the person in front of me bought $300 worth of tickets.  He, nor any of the other $50-$100 players, did not win.