Look at the odds on the raffle below where you select your numbers. Buying extra tickets could payoff, but in the long run it's like throwing away points. You have worse than a 1 in 40000 chance to win. It costs 10 points to play. To win once on average you'll need to play 20000 times, that's 200000 points for a 50/50 chance to win less than 10% of that. Vegas slots have better odds.