From the comments, I think that the general answer is: We all recognize it, because a lot of different places used a logo sorta like this in the 90s.
And we can’t pin it down exactly, because a lot of different places used a logo sorta like this in the 90s.
And being the 90s, a lot of that was never on the internet in the first place.
It rings very strong bells for me, and I don’t think the reason is one that (at the time of this comment) has already been posted… But I can’t for the life of me remember what it was for.
Every now and then, I try to browser without an ad blocker.
That generally lasts until I encounter something that’s bad enough that I don’t really have a choice, and then I turn it back on.
The page needs to actually function. It needs to be possible to click on something and actually be clicking on the thing that you’re intending to.
And it can not have stuff that blinks in a manner that causes a segment of the population (which includes me at times, but not 100% of the time) significant neurological problems.
That last one has been the driving force behind stuff getting reenabled a fair bit.
Oh, and if it’s ads on video content, they need to be at least vaguely reasonable in regards to interruptions and length. Youtube is way past that at this point.