Actually, person will earn more, if more «lockers» he controls, upon condition, that further there are more participants.

For example: There are two persons. Both of them invested equally in the same investment programs. If the first person makes an investment earlier then second, so the first one will receive more. But if we compare 2 lockers: in 3-rd lane and in 85-th lane, when, for instance, there are only 90 lanes, so more profit will be received in 3-rd lane.

Also, it should be noted, that then more participants are in project, the more popular that project will be. So, the more potential people will participate in.