Hosting doesn't have an effect on whether we can compete in competitions right now. When we can't compete is when we can change certain aspects of the competition. For example, I won't be competiting in Card Design War 3 because I'll be hosting it and I'd have to choose artworks for every matchup, mine included, which creates conflict of interest. But I did host and submit to the Flag Design competition.
That being said, there's about six days left to apply, so please get applications in!