All Ready Gos are single rounds. You only have one attempt of scoring. If you quit match during play, you "Forfeit". ANd have lost your chance of geting a score in that Ready Go.
All Ready Gos will close for new entries when 50 players have entered. From time of closure - a 12 hour rule is now in effect. After 12 hours the tournament will be shut down - and the person at top of Leaderboard have won.
Then a new tournament will be listed for entries on the Ready Go menu.
Hope this clarifies it for you?