What's the deal with Destiny's Gold Chests?

Destiny is packed with secrets and the beta deliberately kept many of them obscure, but Bungie has now commented on one…

Gold Chest - Destinypedia, the Destiny wiki

Eric Newgard - Destiny- Golden Loot Chest

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Golden Chests - Destiny Guide - IGN

Golden Chests - Destiny Guide - IGN

Golden Chests - Destiny Guide - IGN

Golden Chests - Destiny Guide - IGN

So aren't the gold and yellow chests meant to give you 10 shards

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OBJ file DESTINY GOLDEN CHEST・3D printing template to download・Cults