There is still value to the sponser in keeping a brand fresh in your mind
The problem with YouTube is not that they have ads...it is that the platform sprays for effect while claiming to care about what they are doing when any reasonable user can tell that they are simply flooding the pipes with ad content.
From what I heard, Google’s sells ad space via an auction system. They collect information about a viewer then when said viewer watches a video/visits a website, all the ad space on the video/website goes on auction with the viewer’s characteristics attached in real time. Advertisers will look at the viewer characteristics and decide if they want to bid. The winner of the auction gets the ad spot and has their ad shown. All this is of course fully automated and over in just a few milliseconds.
What this means is, advertisers have full control over what ads you get. Ad space goes to the highest bidder. If you have money, you can spam a specific demographic to death with your ads. Google does not in anyway try to protect the quality of life of its users.
Google’s system is both amazing and disappointing at the same time. It’s an amazingly efficient way to maximize the value of ad space but disappointing in the Google doesn’t do any kind of advance user behavior modeling to see what ads the user would be most receptive to (i.e. would not frustrate the user, high probability of engagement with what’s advertised, …) instead they leave it to the “free market” (i.e. the advertisers) to figure that out.
Maybe the fix is actually to adjust and make the ad lower energy and more bland to target the subliminal more, assuming the online ad networks don't sort themselves out
There are a small set of products that seem to be everywhere for a while, occupying a minority of sponsor segments. But in most sponsor segments I see one-off products that I'll never see again on any channel.
On the rare occasions where they show something that looks really useful to me, I'd have to take a note because it's so unlikely to be a product I will encounter again.
I don't take those notes, so I've seen a lot of great-looking products that I'll never buy due to forgetting they exist by the time they would be useful to me. When I need something I tend to browse for what's available and/or look at reviews with a skeptical eye, as I'm sure many people do.
So the sponsor segments aren't that effective for me. But I wouldn't call them repetitive, except for a few products that come up a lot.