I could have sworn I've read that every Hololive accounts on Bilibili are run by "fans", despite having the word "official" on them.
If you want to have a monetized Bilibili channel you have to be a native chinese citizen. They only work with national banks, who only open accounts to residents. There is no workaround for this, they are as anal about it as possible, because China is scared shitless of moving money outside of country. To be able to profit off of your channel as a company the only legal way to do so is to set up a proxy company in China, which should have at least 51% ownership by a local company from the government approved list. However, per local laws you have to disclose all of your financial info for the parent company (yes, not the proxy) for them to even consider to open it, keep sending financial reports monthly, have a chinese supervisor who can request any kind of info related to your company at the moment notice (including, but not limited to, names and address of employees) and the list goes on. This is before their updated rules on vtubers that was released some time after Taiwan shit, that's just general rules. But even if you do all of this they can still decide to just... not send you your money because they didn't feel like it. Almost every time any kind of entertainment company which is not native to China is brought up with "They have a huge following in China they must be making millions off of their Bilibili channel!" it's nearly guaranteed they do not get a single penny out of it. There is a second way of doing this, which strictly speaking goes against the rules and can put people running a channel at risk, where they register it as a personal account and then simply send you money, but CCP will come knocking on your door asking why you are sending money to foreigners.
The reddit article you brought up is disingenuous to say the least, portraying people running the channel as some kind of saints who do it for free when in reality they are the ones who are getting all the money from it and then decide how much do they want (and if they want) to send to Cover. Nothing could stop them from lying about it and not giving any money whatsoever. As far as I know they had a proxy company managing money flow, and part of the deal for how Cover was able to set it up was the existence of CN branch, which according to financial reports was borderline bleeding money but it still leaves the question of how much were they actually getting and how much this chinese "fans" were pocketing for personal use
TL;DR - Cover at best had little to no control over channels because chinese autism, income from it was entirely at the mercy of people running it not real numbers, just because it exists, doesn't mean a channel has any affiliation with a company it "portrays" because insert more chinese autism