Its not the reason that these products exist, necessarily. Like his fellow content creator, Steinfeld is far more concerned with collecting than investing and laments the influx of bad eggs purely chasing profits
Cleaning Playing Cards Using Wet Tissues Probably the easiest and safest way to clean up cards is using wet tissues

Legendary Creature - Human Assassin Anthem (CTRL to add secondary) Clones Mocking Doppelganger Flash You may have this creature enter as a copy of a creature an opponent controls, except it has "Other creatures with the same name as this creature are goaded." (They attack each combat if able and attack a player other than you if able.) You may have this creature enter as a copy of a creature an opponent controls, except it has "Other creatures with the same name as this creature are goaded." (They attack each combat if able and attack a player other than you if able.) Creature - Shapeshifter Clones (CTRL to add secondary) Copy Copy (CTRL to add secondary) Creature Jacob Frye Partner with Evie Frye (When this creature enters, target player may put Evie into their hand from their library, then shuffle.) Whenever one or more Assassins you control deal combat damage to a player, exile up to one target Assassin card or card with freerunning from your graveyard

For example, Common cards are printed with the letter C, Uncommon with U, and Rare with R
GR Gold Rare Limited Limited Called by the Grave X SPELL Quick-Play Target 1 monster in your opponent's GY
Oh, and it transforms into the game-ending Aang and La, Ocean's Fury