I want to check one thing. My game is not free. Should I attach a demo (which is already available) or send a free key to reviewer? In this case, will I be allowed to make a link to full game? That's why I joined in the first place.
Personally I'd suggest submitting your demo so people can "try before they buy". However, like the rules say, as long as it's not finished, you can post it, so there's nothing stopping you from submitting the paid version. If the paid version is finished though, it will be removed.