Rodolman literally wagered over 100k+ in order to get the top spot, thats a whale move if I have ever seen one, you do not see that type of wagering in some las vegas casinos (not the huge known ones but the smaller ones) most of the days unless it is a big day like Christmas or a big fight is in town or something. 100K+ wagering is a huge huge amount even if you repeat 100 bucks bets multiple times in a row on automatic, it would take too many bets to reach there.
4 hours is equal to 14,400 seconds. Assuming that the user has bet 10 BTC in 4 hours, he has bet 0.0007 BTC every second.
So, he should have bet 5.6 dollar on average every second.