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by immibis 229 days ago
Both are important - the response code for well-behaved machines, as many tools intrinsically know that 429 means to slow down (also send a Retry-After header if you want more customization), and the text message for humans, as they don't see the response code and would otherwise see a blank page.

Reddit is guilty of sending 429 with no message - try browsing it through Tor and you'll see.