I'm not an expert in mathematics, but the chances of winning the rolex is not 1 in 1 billion, the correct is 1 in 15, this is the logic of probability (if it is FAIR game). I have already ordered a study for a friend who knows how to perform this type of mathematical operation, so that I can come here to expose my doubt more clearly. I know that probability is not an exact science.
You don't have an equal chance of winning every prize. If that were the case we could all quit our jobs and just spin the WOF once a day every day until freebitco.in went bankrupt.
Since you have an equal chance of rolling each number (except 0 and 1,000,000,000, each of which is 0.5 times less likely than all other numbers to hit), You can calculate the odds of winning each prize from the table below.

I didn't really see this table, by the logic I thought it was a simulation of the wheel of real fortune, thank you very much for the information.