Imagine a certain amount of tokens available every day.  People choose to invest in it but can see how much others have too. But the more you invest each day the more you have to shares with others from the same pool. This will likely last for a period of time (if its anything like protoshares/angelshares days.

In angelshares days it was i believe over the course of 180 or 200 days. If memory serves correctly it aas 200 days. So each day you get a new chance to be first in. But if you invest everything in one day you will likely lose out more than if you "trickle" investment.