Vasya and I came up with it, right? What is this nonsense?
The main concept has been stated many times above. Any VT player can play Shades of Darkness, but not every SoD player can (let alone wants to) play VT. So think about it...
The regulations and conditions are determined by the host. If you want something different, suggest your city as a venue for the CIS championship next year and announce your own regulations. Guests only have to decide whether to go or not. Therefore, it is quite logical that Lizard and Vasya, as they are the hosts, decided. They can listen to the opinions of others, or they can ignore them; the final decision always rests with them.