Yes, they are annoying. But so what? For those that activate them, they want clicks and sales; they don't care so much about readership. They are not about "helping" readership; they are about income.
A lot of people do Hubs and blogs for ego-boo. But lots are doing it for the money. The articles are the means to the money; they don't care if you actually read an article or not. They want Google to send you to their Hubs or pages, where you will hopefully click on or buy something.
Now, if YOU don't want them on YOUR Hubs, inactivate your affiliate info and/or make your Hubs "non-commercial".