On the Battle.net server, as I understand it, RP tournaments are held every six months, and the Third RP is currently running in a round-robin system, maybe I'm wrong...
We can extend the tournament deadlines, or just forget about my nonsense =)
UPD
"And there are too many tech units!" But this is hardly a time problem, more likely it's the players' indifference. If the tournament is truly prestigious, the problem will disappear. And if they don't have time to play once every three weeks (RP-3), then there's no point in even entering the tournament, IMHO...