So I read the cash prize rules at https://www.urban-rivals.com/game/rankings/cashprize/efc.php
Looking at article 8.4 it shows nowhere that you are not allowed to use two 5 star cards in your EFC deck. https://imgur.com/a/qvJZmB9
But when trying to run a deck with two 5 stars it shows that the deck is not compatible.
I understand that in normal EFC this is normal but this cashprize season has special rules as seen with the Musafar ban.
This makes the current competition void and there needs to be a change in the rules or a change in the format.
The cash prize tournament uses the same deck rules as EFC. The extra rules dont effect deckbuilding it covers the terms and conditions for a cash prize tournament and has a couple of extra rules covering timeouts and that you dont lose points for inactivity.