You start with 100 Brain points. Each hint costs 10 points. You regenerate 50 points per day, capped at 200. That's the economy.
Why an economy at all? Because unlimited hints turn hints into an answer button. The cost forces intentionality — you spend when it matters, not on reflex.
The cap at 200 prevents hoarding. If you're maxed out, you're leaving support on the table. Use it.
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