On the "grifter" label... it is doing a lot of work...
First, it is applying a gatekeeping function regarding who even has standing to apply narrative framing. For years, many posters here have said that the opinions of people that didn't like Kurtzman Trek didn't matter, either because of political ideology, allegations of false consciousness, tone policing, agism, lack of media literacy, etc, etc... some legitimate concerns mixed with illegitimate one, casting a way too wide net...
We also seemed to have hit meta-narrative singularity with SFA in particular. IIRC, one Star Trek novelist basically said the show's writing quality was bad -- but its politics were in the right place, and that was what mattered. Just what you get with audience hyper-fragmentation.
Do some YouTubers take things too far -- like especially excessively fixating on gay characters? Yes. Do some YouTubers present rumors that lack credibility or are outright lies to get money --- yes again.
But at the same time YouTube is a very small-d democratic place. Unmet audience demand will see YouTubers rise... while peddling false rumors will eventually cause an audience stall or decline.
The SFA creatives opened themselves up to being a laughing stock on YouTube with excess amounts of cringe. I made it to episode 6, but couldn't take it anymore with Paul Giamatti character's excess gastroenterological references and the bat-human hybrid cannibals...
If there truly is unmet demand on YouTube for pro-SFA coverage... the audience will find it.
Much as there are YouTube "grifters", there's also the "access media" -- alleged free shills for a production in exchange for access. Trek Culture and the like. Did their SFA videos do that well? So, again, framing labels can easily be thrown out there.
At the end of the day, SFA was just too expensive per episode and too limiting in how many people its content would appeal to in order to be sustainable. Eventually people will notice and say the emperor has no clothes...