There is already a similar question on this platform and it covers "Running any game of chance with no intent of showing or awarding winner has legal consequences called fraud, at very least. It's in the law for each state." But can I run a game of chance with the intent of showing and awarding a winner, where there is still a possibility that no one wins?
Let's say I was running a promotion and I marketed that each entry has an estimated odds of 1 in 5000. When you enter into the promotion, you receive a ticket with a number between 1 and 5000. When it comes tome to choose who won the promotion, a random number between 1 and 5000 is generated and whoever has a ticket that matches the generated number wins the promotion. Now let's say that 5000 entries were not submitted to that promotion and the random number that was generated does not correspond to a ticket that had been purchased. In that case, no one would have won that promotion.
If I were transparent about that being the method used to choose winners, would it be legal? or do I have to ensure that there is always a winner of the promotion (e.g. choosing only out of the tickets that were entered)? And is it legal to enter into your own promotion (e.g. you fill what falls short of 5000 entries with your own entries)?