This tactics would be easier if all the others would play earlier...
But you may be right, he has the wrong impression that those who enter early and play late would hinder others to play.
On the contrary: When it fills up early, the next RG will be opened soon - new chances for the next players.
Even for the players who signed in it's better: Early completion of entries means early completion of the whole RG, 12 hours later, and then they will be able to enter the next one early.
In one word: Turnaround is better - also a win for the company ;)