I noticed this also. Probably is related to the overnight Update.
EITHER "something is wrong" OR something was intentionally changed with the updates.
There is no "News Item" or Forum Posting about the features of the update as of yet but I agree -
For the moment, Ready Go's seem to have effectively ended for whatever reason.
I did play THREE of them EARLY this morning (5 AM Eastern / 2 AM Pacific Time) but I would venture to guess these were probably "Open" prior to the update (i.e. NOT Closed with 50 players).
For some reason NEW iterations of these are not starting up since the "Update".
Will wait for advisement from WGT.
Regards, AtlantaCoaster