Why does a staff need to give you an explanation about why your submissions weren't accepted?
Then they'd have to do that with everyone that is at least half decent at making hats?
There should not be a submission cap, because then people wouldn't submit a ton of content, and have even less odds to get their stuff chosen. "You can only get 3-4 recolors"... "Oh, I'll only make 3-4 then." It's better to just let them make as much as they can, so staff can have more options to choose from.