So the odds are not that rare as they say. Also look at Lotto max and all the other lotteries, if the odds were this ridiculous we would not be having this many winners each time there is a draw. Fine odds are still very high, but nowhere near as what statistics would show. I wonder what they are if they took the actual data and figured it out vs. the theoretical. Maybe this would show there is something else affecting the theoretical stats.
The shortcoming of 'the actual data' is that it would change every draw. When someone wins, the odds would be the number of winning tickets of the amount sold. To keep it static, they give the odds of a single line being drawn within total combinations (for Powerball it's about 1 in 293 million).
With the exposure/hype surrounding this draw, I wouldn't be surprised if they also had record sales. How close to or over the 293 million combinations were sold would be an interesting number to know. Even if they sold 300 million tickets, with some lines duplicated, the odds of a winner were very high. That's why I'm not surprised that there were multiple winners. Same goes for Canadian lotteries. When the hype surrounding the jackpot increases, then those who play, play more; and those who don't will buy a ticket or two.
Just look at Lotto Maxx. They recently upped the maximum to 60 million. When it started and 50 was the maximum, there was hype when it hit 50. Over time that anticipation waned because people got used to a 50 million jackpot and stopped rushing out to buy tickets; so the increased it. Give it time and they will either up the maximum again, or remove it and let it climb (it'll be interesting to see after last night's hoopla). If Powerball had a similar upper limit, then this week's hype would not have happened.