Someone on Reddit cottoned on to something that was sneaky with Rekordbox 7.
Rekordbox has been quietly dropping units from “free” plan Subscription License
When Pioneer (Alpha Theta) made the update to Rekordbox 7 a couple months ago, they also started dropping units from the performance mode unlocks.
The following units will no longer unlock performance mode (and in some cases DVS) for free, and they will now require a subscription to keep using the units with the new updates. Looking at the wayback machine save from February and comparing to the current hardware unlock list:
All now require a subscription to continue using (per the compatibility chart).
The one exception seems to be the DDJ-RZX, which doesn’t appear to be supported at all anymore.
Solution if this affects you, stay on Rekordbox 6.8.5