I have tried to get some images on Alamy. I followed their submission rules very carefully and so was dismayed to encounter problems.
I have tried several times and always fail their Quality Control check for the reason "Data loss or corruption".
I checked their website for details of what that means and then checked my images very carefully and could see nothing wrong.
So I emailed their Member Services for advice. They sent me a copy of two of my failed images and I was shocked to see the obvious corruption - the whole of the images were a wreck!
Obviously I hadn't knowing