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…

Golden Loot Chests, Destiny Wiki

Golden Chests - Destiny Guide - IGN

Chest (SF4), Shadow Fight Wiki

Destiny - Gold Chest Loot Locations - Moon - Rare Items Guide

Destiny 2: The Witch Queen region chests locations

Destiny 2: The Witch Queen region chests locations

Destiny Golden Chests Location Guide

Destiny Tips And Cheats: All Gold Chest Locations Revealed

Destiny: All 5 Golden Chest Locations on Earth (in the Cosmodrome

Destiny 2 players outraged at Bungie's lack of transparency

Destiny 2 Xur reputation and treasure room guide - Polygon

Golden Chests - Destiny Guide - IGN

Gold Chest - Destinypedia, the Destiny wiki

Golden Chests - Destiny Guide - IGN

Destiny 2: Xur's Treasure Hoard, Starhorse bounties, and Strange Coins