The structure blends "sub" (short for subscription) with "marathon," forming a noun that describes an endurance stream extended by viewer support. It is used to describe a long livestream, often lasting hours or even days, where each new subscription, donation, or cheer adds a set amount of time to a countdown clock, encouraging viewers to keep supporting to prolong the broadcast. Viewers typically participate in subathons to help their favorite streamer break personal records, unlock goals, or simply enjoy an unusually long and unpredictable stream.

英語での「subathon」の定義と意味

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