In theory, if a person/group has the ability to control enough weight to grab a delegate spot bellow 100, than any sit above that is guaranteed.
However, if they are forced to split the weight, this would decrease the likelihood of such scenario.
Whales will be whales in any system and don't think this actually aids in their ability to become more of one. In fact, if a whale were to garner support how would they do this? More than likely they would be buying seats which distributes more of the wealth evenly. But let's look at the system in general. It's something where voters essentially have the ability to elect delegates. If the people see and fear too much power from one delegate they have the power to take their vote away.
That is why I would suggest voting for candidates that reveal who they are, know their background, etc.
I would certainly like to hear other input on this too.