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I Finally Figured Out Why the Website Is Called e621 *Facepalms* [Link]

https://e621.net/forum/show/60507

The link is to a forum thread that may serve as a hint. Otherwise, find it after the break.

E621 (capitalized in proper usage) is an E number, a standardized number for food additives, used in the European Union and Switzerland. E621 in particular is monosodium glutamate (MSG). Don’t ask me why they chose that one.

(Hey, it’s not my fault I took so long to get this; I live in the U.S.!)