It's a sh11ty charge that does no purpose in the game other than waste glimmer. There's no point in doing this when the process to unlock customization and ornaments is already a slog.
I don't need Warframe levels of grinding to unlock cosmetics. Just let them be free, doesn't hurt anyone to remove a glimmer requirement.
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It's the same cost as it takes to purchase copies of a shader from your Collections, minus the Legendary Shards.