Thanks so much for taking the time to explain all of this, your message was incredibly helpful. Your explanation made everything clear.
To make sure that people can permanently keep the game when they claim it, I’ve removed the demo from the page for the entire duration of the free promo. The demo will be back once the promo is over.
Just to confirm: if the full game is the only file available during the promo, that should solve the problem and make it permanently claimable, right?
Thanks again, I really appreciate your help.