You can read about the Jumpstart format here
It will give all of your Green creatures a +1/+1 boost, as well as allow you to scry one whenever a Green creature enters the battlefield
The Spare Deck Sleeves Come In A 64-Sleeve Set With 4 Extra Sleeves, So You Can Fit One Extra For A 60-Card Standard Deck.
therefore a proxy of a 1st Edition Charizard for $4 interferes with Nintendos ability to sell authentic 1st Edition Charizards in literally NO WAY because Nintendo will never sell a 1st Edition Charizard ever again its hard to determine if proxies strengthen or dilute the perception of the game but it might be argued that its a positive consequence of the actual high value the cards hold on the secondary market So because proxies serve a niche, and many proxies are of cards that the original game producers will NEVER reproduce ever again, the fact that it uses authentic artwork might not be enough for the original game producers to jump into action
It's also got the added benefit of having the sneaky morph ability, so you can pay one black mana to put it face-down as a 2/2, and then turn it face-up to become a 3/2 at any time
The result isnt only a complete shutdown of an enemy alpha strike, but also a long-term resource engine that leaves you with lifegain and extra utility
