Keep your cards clean, stay safe, and healthy
Its ideal for Commander players who want to proxy either a few pricy cards, like Gaea's Cradle, or duals to supplement their collection or who want to buy entire decks of proxied cards rather than cutting slips of paper and sticking them into sleeves
The real-world effectiveness of this theory could be debated, but Im more interested in keeping this frame, as something different would perhaps balloon the size of the list (or keep a range of annoying cards in our games)
For this search I am going to be more specific because there is no organization to the cards as we find on TCG Player or Troll and Toad where all the buying options for a specific card are grouped together
This means your Magic: The Gathering collection won't lose value and you'll always have your cards neatly organized and ready to hand, which is not only useful for trading, but also saves a lot of time (and nerves) when building decks
They're about to be sacrificed