It's normal for casinos to have raffles and just logically will get back their money from their prizes. Would be better if stake add more prizes so their participants will also have boosted confidence even the chance of winning is slim.
Aside from the lambo it's already mentioned in the raffle that there will be 50 cash prizes worth $1,000. I also prefer more prizes but I doubt they would be more since the main focus of the raffle here is the lambo.
I totally agree that 1000 dollar should have been lowered, that way it would make sense to have a low amount of chance to win because you didn't wagered that much to begin with, obviously it is going to take a while because they are giving away a lambo and it would not make any sense to spend this much money on marketing and just make it a week, they had to prolong the thing as much as they can and eventually that should lead to them getting more and more gambling from all that attention, when there is more gambling they would earn over 200k profit so lambo would be free for them.
Lowering the wagered amount for the ticket does sound good for the small players but that would only mean more tickets to the high rollers. With a $1k wager per ticket you can probably lose around $10 on average.