A real-world application of this type of analysis could be the foreign exchange market responding to, say, a change in interest rates, but here Ill use the much simpler example of the price of Magic: The Gathering cards after a reprint
[Your Turn] When one of your Digimon would digivolve into a Digimon card in your hand with [Greymon], [Garurumon] or [Omnimon] in its name, by suspending this Tamer, reduce the digivolution cost by 1
True Duel Monsters: Sealed Memories allowed players to use the PocketStation, the memory card with a small screen Sony sold in the country
Then, if you don't have a Digimon, you may play 1 red Digimon card with 2000 DP or less from your trash without paying the cost
This philosophy is embodied by his fondness for Flip Effect Monsters, along with the physically weak "Baby Tiragon"