Patch 3.9 added ward kill gold sharing. That is, whenever a ward is killed, the killer gets a share of the gold, and the person who revealed the ward gets a share of the gold. This means that a support who places a Vision Ward at Dragon will get a share of the 30 gold reward if a team mate clears a ward there.
What happens if more than one person reveals the ward? For instance, if a ward is revealed by both a pink ward and an Oracle's Elixir? How will the gold be split?