I feel like http://eraupload.graalonline.com/ should have a more updated list of the rules for what is, and what isn't legal for custom uploads. Right now there are a lot of missing rules.
Stated on the upload site:
"Heads: please don't upload heads which include hats (and no sunglasses and bandanas)
Copyright: please don't upload ANY heads which you've not made. You will be held responsible for the images you upload. This includes the following - Pokemon, Batman, Digimon, Spongebob
Visual Effects: No invisible, hard to see or half transparant images.
Upload Limits: there is a limit on uploads per player, please make sure your files are ok and don't resubmit the same file again.
Public Shields: these shield types can not be refunded."
I have seen a lot of situations where other players have gotten their customs removed for rules that are not listed on the upload site. The first and most common ones are animal heads. I have ran into a pretty large amount of players who didn't know why their customs were removed and it turns out they had animal uploads or other non human uploads. I know the rules are here on Era-go, but the majority of players wouldn't assume that there is a larger list right here on the forums. I feel like this small fix could help the player base have a more healthier relationship with staff members in the long run. It can prevent situations in which a player unknowingly uploads an illegal custom that gets accepted by a busy PR accidently only to have the player's custom removed later by another Staff member who sees that it breaks the rules and only giving that player half of what he/she payed for.