Some switch to quickly disable all images loading and a similar option for feed
The switch will be very useful for slow or high-cost connections like mobile.
The feed option will help to skip "attention-attractive-only" images loading in favor of fast switching from one item to another. For example, the top.rbc.ru feed contains very large images not very useful for just news reading.
With then new image proxy less traffic is used on mobile devices since overlarge images are automatically downscaled to fit screen width
The ability to keep images from showing is also very important to me. I just want the text, no images or other distracting elements, with the option to "show images" on a feed if I wanted to. (I was testing another Open RSS provider and they had that option, which I liked, but BazQux's interface is much nicer).