This created a clear hierarchy within the SR category base (V.1), alternate art (V.2), and Manga art (V.3) with Manga Rare versions of top Super Rares regularly trading in the $500$800 range
Unfortunately, there has been no indication that any cards no longer available will return to the game nor that they can be traded but for posteritys sake, heres every promo card in the Promo A series
Thats called Jund baby
My best guess was that development felt that most people incorrectly played a flicker effect on a creature you controlled but didn't own (for example, something you've stolen with an effect) and this change was to make the effect work the way most people thought it did
When Market Gnome is exiled from the battlefield while you're activating a craft ability, you gain 1 life and draw a card
Sometimes that effect can be underwhelming because you simply dont have something to put into play, but with all the cards Eshki draws you, I dont foresee that being a major problem