Minimum wage is the minimum amount you can be paid to work.
It makes sense to compare losing time to that. It doesn't mean "if it was minimum wage then I'd do it." The amount you'd actually be willing to give up your free time for is likely higher. But if you math it out and it's less then the bare minimum then it's just like "lol not even minimum wage, joke tier, no chance."
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The batman villians all seem to be one big joke that batman refuses to laugh at - SantaRPG