Probably since he's mentioned before his AEW contract allows him to work for GCW during his free time and he still wants to keep working there from time to time. Those specialty events he runs have been huge money makers so doubt he nor GCW wants to end those any time soon.
A lot of AEW's roster also have similar terms since Luchasaurus and Darby Allin are wrestling at an indies event called Storecade in California this weekend.
http://socaluncensored.com/event/storecade/