In my case I have photographs published in January on The Guardian, sold by Alamy for 5 USD, but appeared in Alamy's reports only in February, so they took me away 60% instead of 50%.
According to Alamy, "Commission is calculated at the point of invoice rather than the usage date so in this instance the commission is correct."
When we signed up, we agreed for a 50-50 rate. Then they changed it at their will, with the excuse that sales will grow. In my case, sales are lower than before.
But is it legal to apply me the new commission as of February, for a photo that has been published in January (it was a direct sale), so has been sold before the commission change?
I know I'm speaking about a few cents, but it is a matter of principle.