I am way late to this and literally no one will probably read it, but I present to you:
Sign up 20 people (10 men and 10 women) in their low-to-mid 20's. Make sure all are given thorough medical exams and have no physical ailments or issues at all, as they will not have access to a doctor in the game.
The contestants are not told the rules of the game, only that there will be 2 winners each of which receives 500 Million dollars, everyone else receives 50 million dollars. The rest of the money will go to building/running this game.
Put them in a giant bio-dome with everything they need to survive. Livestock animals, fruit, vegetables... all perfectly sustainable.
Place the 20 contestants inside the bio-dome, completely devoid of anything from the outside world, including clothing. No human comforts, nothing. They live in an "Eden" environment, without need to work but also without human comforts of any kind.
The the bio-dome is a one-way mirror, so no one can see out, only in. The contestants can be monitored from hundreds of angles online streaming in real time.
The contestants will be left completely alone, with no interaction from the outside world. The game will go on as long as it takes to end. It could take years, it could only take months.
The game only ends when a new person is created inside the dome. When one of the contestants successfully gives birth to a baby, the game has ended. The winners are the biological mother and father of the child.
You can pay $20 per month, $100 for 1 year, or $500 for "Lifetime" rights that will allow you to watch for as long as the game goes on.
Video will run a small ad at the bottom to boost revenue.
It will be the ultimate show for all to watch! And the best part is, once it ends, the bio-dome can be re-used for a new show only with different (but still unknown) rules on how the winner is decided! Maybe for season 2 the winner is the first person to successfully escape from the dome! Who knows!? Certainly not the contestants.