Here is my take on it:

It may simply mean they are conservative players, and I will explain why. There is a fairly common tell that if somebody keeps their chip stacks nice and neat, often evenly divided in a concrete system, they are usually a conservative player.

So, I'd say there is a better chance than not that if this person is trying to make his stack end in a 0 or a 5, they are trying to keep their "stack" nice and neat.

Just a thought, anyways.