There is no timetable on when or if a source request may be filled (also applies to bug reports and enhancement requests).
- In general heavily paywalled sites
- Sources that require cracking some app's source code (realistically, no one's going to put in the effort to do it)
- Sources that are known for filling a lot of DMCA complaints over repositories on GitHub
Here is a list of known sources that were removed.
- Anchira https://github.com/tachiyomiorg/tachiyomi-extensions/pull/19149
- Bakai https://github.com/tachiyomiorg/tachiyomi-extensions/pull/17890
- Blackout Comics and Izakaya https://github.com/tachiyomiorg/tachiyomi-extensions/pull/18500
- ColaManhua (COLA漫画) https://github.com/tachiyomiorg/tachiyomi-extensions/pull/11445
- Comikey https://github.com/tachiyomiorg/tachiyomi-extensions/pull/11971
- Constellar Scans https://github.com/tachiyomiorg/tachiyomi-extensions/pull/17277
- CopyManga (拷贝漫画) https://github.com/tachiyomiorg/tachiyomi-extensions/pull/12376
- Cứu Truyện https://github.com/tachiyomiorg/tachiyomi-extensions/pull/16654
- Hentai Kai https://github.com/tachiyomiorg/tachiyomi-extensions/issues/9999
- Hitomi.la https://github.com/tachiyomiorg/tachiyomi-extensions/pull/11613
- HQ Dragon https://github.com/tachiyomiorg/tachiyomi-extensions/pull/7065
- Japscan https://github.com/tachiyomiorg/tachiyomi-extensions/pull/17892
- Koushoku https://github.com/tachiyomiorg/tachiyomi-extensions/pull/13329
- LeerCapitulo https://github.com/tachiyomiorg/tachiyomi-extensions/pull/16255
- Mangá Host https://github.com/tachiyomiorg/tachiyomi-extensions/pull/7065
- Mangá Livre and Leitor.net https://github.com/tachiyomiorg/tachiyomi-extensions/pull/8679
- MangaDig https://github.com/tachiyomiorg/tachiyomi-extensions/pull/14974
- Mangas.pw (Mangas.in) https://github.com/tachiyomiorg/tachiyomi-extensions/pull/9489
- MangaYabu! https://github.com/tachiyomiorg/tachiyomi-extensions/pull/9336
- ManhuaScan https://github.com/tachiyomiorg/tachiyomi-extensions/pull/7129
- ManhwaHot https://github.com/tachiyomiorg/tachiyomi-extensions/pull/7129
- Mode Scanlator https://github.com/tachiyomiorg/tachiyomi-extensions/pull/17865
- Neox Scanlator https://github.com/tachiyomiorg/tachiyomi-extensions/pull/12695
- Reaper Scans (EN) https://github.com/tachiyomiorg/tachiyomi-extensions/pull/16819
- SuperMangás and SuperHentais https://github.com/tachiyomiorg/tachiyomi-extensions/pull/6348
- TopToon+/Day Comics https://github.com/tachiyomiorg/tachiyomi-extensions/pull/10851
- Tsuki Mangás https://github.com/tachiyomiorg/tachiyomi-extensions/pull/8609
- Union Mangás https://github.com/tachiyomiorg/tachiyomi-extensions/pull/7065
- YES Mangás https://github.com/tachiyomiorg/tachiyomi-extensions/pull/7065
- ARES Manga https://github.com/tachiyomiorg/tachiyomi-extensions/issues/15396
- Astra Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/13845
- Dat-Gar Scan https://github.com/tachiyomiorg/tachiyomi-extensions/issues/18441
- Gourmet Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/6192
- Hikari Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/6611
- Hunter Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/12392
- JuinJutsuReader https://github.com/tachiyomiorg/tachiyomi-extensions/issues/2958
- Knightnoscanlation https://github.com/tachiyomiorg/tachiyomi-extensions/issues/4240
- KomikTap/KomikTap.in https://github.com/tachiyomiorg/tachiyomi-extensions/issues/6133
- Luminous Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/9923
- MangaPro https://github.com/tachiyomiorg/tachiyomi-extensions/issues/13989
- MangaSY https://github.com/tachiyomiorg/tachiyomi-extensions/issues/12007
- Mangawow https://github.com/tachiyomiorg/tachiyomi-extensions/issues/5367
- MHScans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/15319
- Mono Manga https://github.com/tachiyomiorg/tachiyomi-extensions/issues/17634
- Moon Daisy Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/17929
- NarTag https://github.com/tachiyomiorg/tachiyomi-extensions/issues/8038
- Plot-twistnf-scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/4242
- Realm Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/15586
- Remangas https://github.com/tachiyomiorg/tachiyomi-extensions/issues/18807
- Reset Scans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/13168
- SetsuScans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/11040
- ShinobiScans https://github.com/tachiyomiorg/tachiyomi-extensions/issues/14457
- XXX Yaoi https://github.com/tachiyomiorg/tachiyomi-extensions/issues/9535