The $6.99 transfer promo just worked for me at 10:00 UTC. Thank you Epik for reinstating the promo.
I had some domains in my cart last night at $6.99 and the price changed to $8.49 when I tried to check out at 00:02 UTC after getting the auth. codes. I contacted support via live chat and they said the promo had ended at 00:00 UTC.
As this promo could end again at any time, I placed my order immediately this time without unlocking the domains or waiting for the auth. codes from the losing registrar. Once the order was submitted, I clicked on 'Transfers' > 'Get transfer status' in the Epik control panel. From there I was able to enter the auth. codes manually once I had unlocked the domains at the losing registrar.