Well, lorewise derbs.. as in dice herbs need storage space. So the more you have the more it costs. I guess that firewood is just a rare commodity so the price keeps going up as the days go by. :D It mostly serves just as a mechanic to make the game.. end.
Im definately with you on more things to do between business days.. Let's see if we'll have an after jam expansion. Atleast to make store bit more usefull :)
Thank you for your feedback and thanks for playing!
P.S Our record is.. 47 days. How far did you reach?