I wouldn't extend this specific sale, but yeah, one month is a bit short if people need to shuffle funds around or sell. I guess it was meant to create urgency, maybe it will be different now that a the pressure is a bit off.

That said, you can always create another land card pack. Especially with the talk about building managers it seems like there could be more interesting abilities than %discount and %buff. At least for someone like me who doesn't care about art or skins the cards are rather boring.