I wouldn't participate if it were not the UK lotto or Euromillions simply because I keep no data for any other lotteries and have no system(s) in place to generate valid entries for differing formats.
Not wishing to be a spoilsport, on the subject of valid entries, I must admit I'm at a loss to see how sets of numbers posted three months in advance of the target draw can be a serious entry for the challenge. What system can generate realistic entries? I'm not objecting, just putting the thought out there. Surely, an entrant can manage to post some fresh numbers at least once a month? If I were marking the scores, I would see a bunch of 20 posted in advance a bit of a chore and a waste of time, but that's just grumpy old me!
At the end of the day, Icewynd is doing all the work, so I will go with the flow.