Out of curiosity, is there some reason a 15sec preroll on 7 shows is so off putting? Are they some of the main things you'd watch? Is it the principle of ads in an "ad free plan"?
If some videos don't go ad-free, then it just makes it really unclear what you're buying, when you are paying money to get rid of ads. It is much less confusing if paying money to get rid of ads, actually gets rid of ads.
* I'm paying for ad-free (in this hypothetical - I'm actually content with the above post mentioning that they clearly tell which shows are exceptions in advance), so yes, ads bother me.
* Why do ads bother me? It's a combination of: ads tend to pander to the lowest elements of the psyche/society; ads are explicitly manipulative - I don't enjoy exposing myself to manipulative people, why seek out or even tolerate this sort of exposure?; ads are disruptive to the experience I'm trying to have (pacing/tone/subject matter); ads consume time, something I have a limited capacity of.
* I stopped watching cable TV in college (some 15-20 years ago), and I immediately found I felt "smarter", more focused, with more available time, and (as a con) less in touch with the common zeitgeist (an experience somewhat similar to not following facebook or twitter today). This, despite the fact that I still "wasted" plenty of time watching movies and shows. As Netflix became prevalent (first in DVD, then in streaming) I found I could remain entertained without exposure to ads.
As I relied on the web for more news/entertainment, I found that ad blockers vastly improved the experience. Perhaps I've been oversensitized to the topic, but I usually find I'm more than willing to pay to get my experience ad-free, as the experience is just better then.
I've been frustrated at things like Huluplus and Youtube where I previously didn't have an ad-free option, despite my willingness to pay for such, so I have little doubt that frustration combines with the earlier sensitivity to make me more bullheaded on the topic.
Wanting things to be ad free can be a strong response to the overwhelming amount of ads that we are presented with every day. These advertisements program us unconsciously and often to our detriment, so yes it is important for there to be an option to remove all advertising for a price.
I feel a strong motivation to punish companies who commit bait & switch product promotions. Don't promote ad-free premium service to me, then send me ads.