I keep hearing people talk about a "sale." Perhaps intentionally, I haven't heard anyone who would actually know confirm or deny this. Not sure that it matters, but just thought I'd point that out.
As for ads, I don't necessarily mind them as long as there are no pop-ups or sound. Even animation would be annoying, but I don't mind banners. That said, since this site already lacks a mobile interface, it might be annoying to the mobile users. And I know some people just don't like ads.
As for ads decreasing the cost of premium ... not sure about that. Premium has only gone up $5 (25%) over the course of 5 or 6 years. I don't think that even keeps up with inflation. I wouldn't expect a price reduction anytime soon.
I should note that I have no authority over any of the topics on which I just spoke. Completely opinion