Here are some of the event IDs in question:
200506075471, 200505313861, 200505242541, 200505170751… all events run by affiliate A6015523, which are all titled Rainbow Chess 30/30 (or some other form of G/30 title).
This affiliate runs a tournament once a week and all the games are played at G/30, but I only see a handful of these tournaments have been dual rated.
Thanks,
Chris