Brand teams at big companies, especially those in regulated industries, are incredibly risk averse. With Twitter typically being a small minority in a marketing mix, there’s a quickly diminishing benefit to sticking it out.
Add in a buggy ad platform that can steal your money? Lol nope.
The content is similar to right-wing Twitter, someone says how the Woke are letting Indians replacing the whites of America and the others reply to these with counter claims. Typical alt-right BS is everywhere and this is just one example from a recent popular topic.
The website is pretty much what Musk promised for free-speech: Anything legal goes. Of course a lot of anti-govt stuff is removed all the time because, Turkey. But stuff like this stays and all kind of brands have no problem advertising here. The website is alive and well since 1999 and the founder is very well known person who moved to California for good(probably was afraid from the Turkish govt, they were arresting media bosses all the time).
My point is, that brand safety stuff might not be absolute. I get your reasoning but that reasoning doesn't seem to apply everywhere and I wonder why Twitter wouldn't get an exception too.
What you're missing is that Twitter is not a top-tier advertising channel.
They are a very distant 3rd behind Facebook and Google and getting worse by the day. So it's not like advertisers are desperate to run ads on Twitter. In fact it has been the opposite. Twitter had to go out of their way to convince advertisers to come e.g. brand safety teams, account managers etc.
And now that those teams are gone the status quo is actually for advertisers to not run ads.