Also more hidden details are in the rules. It is being paid by GDC (Game Developers Confererence) but mostly it is part of CDG events. Credit card only for people who do have money to pay the fee. GDC can use physical materials to promote and sell their products (meaning they can use your stuff without asking, not IPs). If you do plan on going, they do not help you with computer stuff or give you any computer. All your games must be played in your computer (if you have a super computer you need to bring tha computer), there are ways like remote desktop but i do not think they will allow that.
This is what i hate the most, the rule says you are responsable for taxes and fees, which is what will happen because $1000 for certain banks in their agreement is too much or if you are in another country that is even too much money.
Judges may not be able to play your game, so what does this mean? It means if you build something like a new VR they might not be able to play your game or older systems like NES is something they might not be able to get.
Just being there at GDC means they can use your one time in the event to promote themselfs for money.
Don't trust this event for anything it is all a plot to promote themselfs.