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Hear me out: Vtubers song writing and creative works guild.
Vtubers could have a guild with different tiers of challenges for different tiers of adventururs. Sort of like the guild in the anime Overlord. Vtubers make a request that asks for a copper plate tier adventurer or higher. If the request is more difficult a silver plate or higher. If the quest is more difficult a gold plate, or higher. If the quest is more difficult a adamantine plate, or higher.
That way people won't accept your request if its below their capabilities to save the guild embarrassment.