I have a borderline question again, but it's a real problem for me.
I have noticed that the original sizes (1000px) of my older pictures on Flickr are no longer available and the biggest size is now 640px. The downsized versions of the pictures are also oversharpened.
I don't have pro account.
Is this a normal practice? Does it depend on the amount views or anything else? I couldn't find any information from their help pages nor Terms and Conditions. What should I do to avoid it?