Sharing rare scans helps preserve lost media. Some "exclusives" from 2018 are no longer available for purchase because the artist deleted their social media.
Thus, “doujindesutviribitarigalnimankotsukawas exclusive” might be an attempted search query for: “Doujin desu TV – Ribi Bitarigali niman Kotsukawa exclusive” — perhaps a user trying to locate a video (TV) of a live drawing event (Ribi = Live) related to the Bitarigali Gallery’s 20,000-yen Kotsukawa exclusive. doujindesutviribitarigalnimankotsukawas exclusive
Let us break the keyword into plausible Japanese and English fragments: Sharing rare scans helps preserve lost media