Apparently it was miscommunication from FB / Oculus and I am allowed to distribute App Lab keys again.
You should now be able to claim your App Lab key on itch.io after your purchase.
Sorry for the inconvenience,
Myron
Viewing post in Oculus App Lab Keys are available again
There is a Get Oculus Key button on your download page. Click on it and you will get your App Lab key.
You can then redeem your key here (you must be logged in with your Oculus/Facebook account) : https://secure.oculus.com/redeem-code/