The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
After its age verification announcement was met with backlash, Discord clarified its age estimation tech would mean the "vast majority" of people would not need to complete age checks.
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12. World Economic Outlook Update, January 2026: Global Economy: Steady amid Divergent Forces - IMF, www.imf.org/en/publicat…
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