So the Icopy-XS has these proprietary restrictions removed for most cases.
Also, there has been analysis done so you can create your own compatible cards. All that is done is a password is set for the T5577 cards. If you follows these steps you can create your own cards which work using the Icopy or Proxmark.
The Icopy does not have the keys/passwords used for Icopys own cards but they are on the link above