I managed to get 99% of The Signal (2007) stills from a website on perfect quality and resolution.
So I started to upload them some are being rejected as "bad quality". The only "issue" I see with some of these still is that they repetitive, and they are all different to each other, ripped from a official website and everything... So I don't get why they are not being approved at all...
Who and what defines "bad quality", on the guidelines there's nothing about it. And even if they are considered bad quality, they are still, quite literally, official material from the movies.
This is also not the first time some of "my" stills with good quality image gets rejected, not to mention times where they are changed of classification and tagged as official screenshot when they are not etc.