I also ran into one site, forgot which one, that wanted 50% of everything the writer makes off it... that seems very exploitive.
Very exploitive?
That's daylight robbery, not simply being exploitive. I don't know what site it was that you visited, but most sites take less than 10%. Patreon takes 5 or 8 depending what benefits you want, if I remember correctly.
Webnovel has generally bad reputation, and that's largely because it's one of the few sites that take payment for the stories directly. Most live by ads and people's support while the authors have accounts on Patreon, and you need no contracts with them.
And nobody is going to translate the entire site anyway, so probably 95% of everything will always be English only anyway.
Really? I'd like to know why more than half of the relatively popular manga on sites like MangaDex is at least partially translated to other languages.
Scribble Hub is an English-only site largely to make it easier to manage, and the potential loss of stories and readers is not large enough to sway the management. You are hardly the first person to suggest it and I've no doubt you won't be the last, but unless something drastic happens, I doubt anything will change in that regard.