I am not here to argue with you since you obviously have no intention in helping anyone. You are doing a good job showing that something works for you (and you only) and I appreciate this because then we get more info on a potential issue, however you should also appreciate what other people have to show. For example, in your first post you immediately assumed I had adware as if you were 100% certain it was me and not twitch. The assumption is valid but you could have just asked “Hey did you check if this happens on other PCs? Maybe you have adware?” etc.
Anyways the reason I cannot provide “hard evidence” is because this bug/issue happens in certain situations only. I just tested it on a couple of more popular websites (GosuGamers, DotaCinema …). Here is for example the same thing happening on GosuGamers.net.
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The reason why I think it is the twitch player is because those elements are positioned on the edges of it. In the image above you can see the first element is on the top center of the player.
Once again, it doesn’t happen all the time, I noticed however that when an ad plays the elements don’t get injected. I assume this has to do with AdBlock, for example I whitelist both the host website and twitch.tv but since some ads might be served from other domains the script is interrupted and all that is left are those elements.
Oh, and it also happens on your “test” website sometimes:
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Also, I am certain this is not adware since I tested in on other PCs and asked friends who also reported the same issue. This could be an ad that is shown in specific regions only.