Yes, sure, it can go into any green deck and start putting counters on things, but to get the real synergies with this going, you need to be in a dedicated +1/+1 Counters deck
But right now, gift codes cannot be bought using real-world cash, or purchased in-game in any capacity
Back in the old day, we generally had Draft Booster Boxes, the occasional supplementary Starter Deck product, and thats kind of it
Some find this to be a downside of the format, and while perhaps it could be lessened for the better of the format's health, I personally enjoy the challenge of fighting through hate in the deckbuilding process and in actual games
Illustrated by Yongjae Choi Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Not Legal Brawl Legal Legacy Legal Comp
As such, what you can play on your PC is a more limited version of Standard with a bunch of missing staple cards