Let's not all put the blame on the fujos here, for once. For all its worth, Nijisanji JP never really got much attention nor having the 'N-word' moment that Hololive gotten no thanks to
reaction.
While yes Niji has Tsukino Mito who's style of personality back then was enough to gain
some attention, it's not as enough compared to Miko. Them being purely focused toward JP doesn't really entice much to the western folks unless it's interesting to them. That said, it's not like it means they didn't get translations (there exist one or two), but for whatever reason it doesn't hit it off like Hololive would.
I don't know if there are list-able factors, but I can hazard a guess things like:
-
The fact that clipping JP means translating JP, and they can't really MTL it or something
- The fact that Niji doesn't try to capitalize on hiring clippers/translators to introduce the JP to western audience and instead make them do EN clips (which didn't do well)
- The fact that there isn't talents that could easily talk or interact with the western side of things and give incentive or something to translate over. Hololive got some of their vtuber who at least tried to do engrish or you know... Coco.
- Other factors that either Niji didn't capitalize or it happened due to pure luck thanks to algorithm (Hololive getting noticed, for example)
By the time EN rolls around, EN became it's own hot thing and the clippers naturally just floats there, since it doesn't have the need to translating foreign language, it's remarkably easier. Then the fujo market came in, and I guess the rest is history.
You have to understand that this is
before the kurosanji happened. There's no selen terminated-level of fire back then, Niji just didn't able to entice the western audience to start clipping/translating. There are clippers who have worked with Niji and it was during the start of EN, but that's about it.
As for dedicated fans, it's just not enough. Oh yes, there's dedicated fans but is there
anyone within such fans that is capable to translate and clip things? Maybe there is, but the majority would either find themselves not picked up by the algorithm (since Hololive was the big thing during that period) or they feel like they would get better views or subscription if they go for the more popular thing.