I'm starting to familiar with some usernames who dominates your races all the time. They must be your most active players with high VIP level.
In a race as short as 30 mins with regular players who are willing to go big I think the chances of a newbie winning are limited to say the list.
Surely, a different turn of events might occur of the race was to be extended but then I suppose that's what people like about this place, short and to the point. You'll know if you've won or not rather quickly, so I think this quick turnaround is something these guys pride themselves with.
Since the number of players wagering there on the site are less and the wagering competition last only for 30 mins, so if any newbie comes to their site with a big balance, he can easily beat all the others and end up in top 10 to get $150 share.