Presumably that's not the point. It raises awareness of the death (first I've heard of this). That gets people talking (even without proof) and gets the Wikileaks name on anything that does turn up.

Charitably, it could cause someone to realize that some piece of knowledge is part of a larger issue, but I'd be stunned if that was the real point.

Some people are in fact motivated by money. Lots of things will begin to make sense to you, if you consider them from that perspective.