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?
The killer of the ward gains 50% of the ward's base gold value. Nearby
allied champions with Oracle's Elixir, or allied champions that placed
Vision Wards nearby, split 50% of the ward's base gold value.
That is to say that if multiple players reveal the same ward, they share the 15 gold reward.