This strategy is usually done by whales but there must be a condition, it is that the reward is worth enough to wager in such way.
Because to have big amount of wager in short of time requires big bankroll as well as big bet amount so they can step up in the leaderboard fast.
If we realize that we are small players and we know that there is a chance to be one of the winners, wagering small amount but do it since the 1st day is a safer way than waiting for the last hours to bet bigger than what we used to do.