The Lucky Lotteries Mega Jackpot has gone above 19 million now.
There are 200,000 raffle entries to purchase; if someone buys all entries for $1.1 million, that person is guaranteed to get back 316,000 as raffle winnings.
Then that person is also left with a 1 in 47 (or 2.1%) of winning the Mega Jackpot (currently over 19 million ).
If you have a spare 1.1 million, would you take this gamble?
I wouldn't do it with just 1.1 million, but If I had 20+ million in wealth, I would.
This question boils down to a simpler "Do you like gambling money or not?" Spending 5% of your total wealth on a big bet in your example of having $20 million is pretty stupid investment wise as you're going to lose money most of the time.
Generally people with money don't throw away money (if they've accumulated it themselves) but there's always exceptions and as you say - 1 out of every 47 will make it big.