I mean, it's DEFINITELY doable, in some fashion or another. I don't know the specifics of how they could go about doing it, but I am sure our team could come up with something to do it. Bare minimum, the game is equipped for code redemption, so they could figure out how to use that and have a new code every day in the GMOTD. The real questions are:
How hard would it be to do?
And
Is it worth doing? (Which is a factor of: Player interest, dev interest, and difficulty to do)
For my part, I would say it's not worth it. As others have said, dailies are used to keep people "engaged" with the game. ("I need to log in to get my thing today." "Well I'm logged in, I may as well play for a little bit.") In a free, community driven server like this... we don't need to encourage people to come back, because this isn't a for-profit system, if people lose interest in the game, there is no significant incentive to keep them coming back every day "in case they decide to play again"