trehans·6 mesi fa·discussCan I suggest changing background color of the tiles between blue and red to indicate how warm each spot is? Would make it easier at a glance.
trehans·10 mesi fa·discussIIRC many websites (e.g. for buying concert tickets) have a lock mechanism where you have X amount of time to make your purchase during which time only a limited number of people can be in the checkout process.
trehans·11 mesi fa·discussOr... there is some elasticity with price and supply/demand, which falls totally within microeconomics