I would hedge odds that are out a bit but thats perhaps a bit risky for larger amounts as one bet at least will not pay. 1.8x is not far off even odds result prediction, depends but obviously the house will win on either team you dont get exact odds.
The largest group is people with 3-5K tickets and we see a lot of them among the winners.
It would probably take a computer program or smart spreadsheet to sort through it all and estimate proper accuracy because the real world stats are varying the size of tickets so often. We can estimate averages though. The other thing I was thinking of is if a person just wins once per week, each prize alters in probability as maybe the biggest ticket holders are taken out of the running which helps the smallest bettors.