If your favorite KiwiSDR is full, you can listen to what other people are listening to and put yourself in a queue.
Read more here:
https://www.hfunderground.com/board/index.php/topic,79143.0.html
For your wintertime listening pleasure, the session timeouts and maximum daily times have been increased. On receivers 1, 2, and 3 there is a 3 hour per session timeout and a 10 hour per day maximum per person. On receiver 4 there is a 6 hours per session timeout and a 18 hour per day maximum per person. Timeouts are instituted to make sure that inactive sessions don't tie up a receiver and prevent others from using it. If your session times out you can reconnect up to the daily maximum. https://n1nte.blogspot.com/p/online-kiwisdr-receivers.html