Rule 2 i don't understand

[Jean-Claude]

2. No messages
You must not talk in your demo (or have anyone else talk for that matter). You will get credits on the site, and that is enough.

I don't understand what that means. Can someone tell me?

[[SoE]_Zaitsev]

If you keep spamming in the demo it can be very annoying to watch it. Or if you keep using voice commands like ''Move in'' or ''Grenade'' it can become irritating very quick!

That's probably the main reason. People want to watch them, not getting pissed off by watching it.